Which Geothermal Pool Is Right for You?
If you’re planning a trip to Iceland, soaking in geothermal water should absolutely be on your itinerary.
But with so many hot springs and lagoons to choose from, which ones are actually worth visiting?
From luxurious spas overlooking the ocean to hidden countryside hot springs and historic swimming pools tucked between mountains, Iceland offers something for every type of traveler.
The best part? They’re all completely different experiences.
Whether you’re looking for luxury, relaxation, history, or a little adventure near the Golden Circle, I’m sharing what makes five of Iceland’s geothermal pools unique, what to expect, and how to decide which ones deserve a spot on your itinerary.
Iceland’s Hot Springs: At a Glance
| Hot spring: | Best for: | Experience: |
|---|---|---|
| Blue Lagoon | Iconic Iceland experience | Luxury spa, blue water, silica masks |
| Secret Lagoon | History and value | Traditional geothermal pool and geyser |
| Sky Lagoon | Couples and wellness | Oceanfront infinity pool and spa ritual |
| Hrunalaug | Rustic scenery and nature | Small countryside geothermal pools |
| Seljavallalaug | Scenic hikes and history | Historic mountain pool with dramatic views |
Blue Lagoon: Iceland’s Most Iconic Geothermal Spa
Best for: First-time visitors, luxury travelers, and anyone wanting that famous Iceland experience.
Location: Reykjanes Peninsula, approximately 20 minutes from Keflavík (KEF) Airport and 45–50 minutes from Reykjavík.
You’ve probably seen the photos … milky-blue water surrounded by black volcanic rock, steam rising into the cool Icelandic air, and people floating around with white silica masks on their faces.
And yes, it really does look like that!
But here’s something we didn’t fully appreciate before visiting: Blue Lagoon isn’t an ancient natural hot spring.
It formed in the 1970s as a byproduct of geothermal energy production at the nearby Svartsengi power plant. Mineral-rich geothermal seawater collected in the surrounding lava field, eventually creating the famous lagoon.
Locals began bathing in the water during the 1980s, and what started almost by accident eventually became one of Iceland’s most recognizable attractions.
Today, Blue Lagoon is much more than a swimming pool. You’ll find swim-up bars, silica face masks, steam rooms, waterfalls, dining options, and premium spa experiences.
It’s polished, modern, and designed for spending several hours relaxing.
What we loved: The scenery is every bit as incredible as the photographs suggest. Floating through bright blue water surrounded by volcanic rock feels almost surreal.
Is it touristy? YES. But sometimes famous attractions are famous for a reason.
Things to know before visiting:
- It’s one of Iceland’s more expensive geothermal experiences ($$$)
- Reservations are strongly recommended (we made ours months in advance)
- Early-morning visits can offer beautiful lighting and potentially fewer crowds (we loved our 7am start time!)
- Check operating conditions, as volcanic activity on the Reykjanes Peninsula has periodically affected access (when driving in – you get to literally drive through freshly formed lava fields!)
Verdict: If you’ve always dreamed of visiting Blue Lagoon, I’d absolutely recommend considering it. It’s iconic, memorable, and one of those experiences that really does live up to the photographs. Highly recommend splurging on the Signature Package that includes two drinks at the swim-up bar, two additional mud masks, and a take home gift (cost: ~150 USD/ 18,490 ISK).
Secret Lagoon: Iceland’s Oldest Swimming Pool
Best for: History lovers, budget-conscious travelers, and anyone seeking a more traditional Icelandic experience.
Location: Flúðir, approximately 90 minutes from Reykjavík and conveniently located along the Golden Circle.
Despite the name, Secret Lagoon isn’t exactly a secret anymore!
But compared with Blue Lagoon, the atmosphere couldn’t be more different.
Known locally as Gamla Laugin, or “Old Pool,” Secret Lagoon dates back to 1891, making it Iceland’s oldest swimming pool.
Unlike Blue Lagoon’s modern resort atmosphere, Secret Lagoon has been part of Iceland’s geothermal bathing culture for more than 130 years.
The experience here is refreshingly simple.
There’s one main geothermal pool, naturally heated to approximately 100–104°F (38–40°C), surrounded by steaming geothermal features. A small geyser nearby erupts regularly, adding to the atmosphere.
No elaborate spa circuit. No extensive luxury amenities.
Just warm water, beautiful scenery, and a little Icelandic history.
What we loved: Secret Lagoon felt more relaxed and traditional. There’s something special about soaking in a pool that Icelanders have enjoyed for generations, with geothermal activity bubbling around you.
Things to know before visiting:
- It’s generally significantly less expensive than Blue Lagoon ($$)
- Changing rooms, showers, and basic refreshments are available.
- It’s an easy addition to a Golden Circle road trip.
- It’s smaller and simpler, but still popular with tourists.
Verdict: If you prefer a traditional geothermal experience over a luxury spa, Secret Lagoon is an excellent choice. It’s historic, relaxing, and offers great value.
And while the secret is definitely out, it’s still worth visiting!
Sky Lagoon: Modern Luxury Meets Icelandic Tradition
Best for: Couples, wellness enthusiasts, and travelers staying in Reykjavík.
Location: Kópavogur, approximately 10–15 minutes from central Reykjavík.
Opened in 2021, Sky Lagoon is one of Iceland’s newer geothermal attractions, offering a completely different atmosphere from Blue Lagoon and Secret Lagoon.
Think modern Nordic design, dramatic ocean views, and an infinity-edge lagoon that appears to blend into the North Atlantic.
Its signature experience is a seven-step bathing ritual, inspired by traditional Icelandic wellness practices and incorporating experiences such as a cold plunge, sauna, steam, and body scrub.
While the spa itself is relatively new, its design incorporates elements inspired by Iceland’s historic architecture, including traditional turf-covered structures.
It’s a beautiful combination of modern luxury and Icelandic bathing traditions.
Why you might choose it: If your ideal afternoon involves ocean views, a sauna, and a relaxing spa ritual, Sky Lagoon could be your favorite.
Things to know before visiting:
- It’s conveniently located near Reykjavík.
- It’s a premium spa experience, with pricing depending on your package.
- Advance reservations are recommended.
- Consider visiting around sunset for especially beautiful ocean views.
Verdict: Sky Lagoon is an excellent alternative for travelers who prioritize modern wellness and relaxation over historical significance.
Hrunalaug: A Rustic Hot Spring With a Surprising History
Best for: Nature lovers, road-trippers, and travelers seeking a smaller, more intimate geothermal experience.
Location: Near Flúðir, South Iceland, just a short drive from Secret Lagoon.
If Blue Lagoon is all about luxury, Hrunalaug is almost the complete opposite.
Tucked into the Icelandic countryside on a family-owned farm, this small geothermal bathing spot feels worlds away from Iceland’s larger spa attractions.
And its history is surprisingly interesting!
The property has been in the same family since the late 1800s, with the original bathing facilities dating back to around 1890.
Historically, the pools were used for bathing and washing laundry.
But here’s my favorite part: one of the pools was actually built for bathing sheep!
In 1935, a separate pool was constructed so the farm’s sheep could be washed to help prevent disease. That practice continued until the 1980s. Today, visitors can enjoy geothermal bathing in a beautiful countryside setting, with newer facilities added over the years.
There’s no giant resort complex or elaborate spa ritual. Instead, you’ll find small pools, grassy hills, and an atmosphere that feels much more connected to the surrounding landscape.
What makes it special? Hrunalaug offers a completely different experience from the larger lagoons. The countryside setting and unusual history makes it memorable in its own way.
Things to know before visiting:
- It’s much smaller than the major geothermal lagoons.
- Admission is paid, and visitor numbers may be limited (reserve in advance!)
- Facilities are relatively basic compared with luxury spas.
- It’s conveniently located near Secret Lagoon, making it easy to include both on a Golden Circle itinerary.
Verdict: If you prefer a rustic countryside setting over a polished spa, Hrunalaug is a great option. And now you’ll have a fun story about the sheep to go along with your visit!
Seljavallalaug: A Historic Swimming Pool Hidden in the Mountains
Best for: Adventure seekers, photographers, history lovers, and travelers exploring Iceland’s South Coast.
Location: Near Skógar, South Iceland, approximately two hours from Reykjavík.
Imagine walking through a dramatic mountain valley, surrounded by towering green slopes, and discovering a swimming pool tucked against the mountainside.
That’s Seljavallalaug.
And while it looks like something straight out of a travel magazine, this isn’t a modern luxury spa.
Built in 1923, Seljavallalaug is one of Iceland’s oldest geothermal swimming pools, tucked into a stunning mountain valley along Iceland’s South Coast.
Originally constructed to teach local residents how to swim, the 25-meter pool sits near the southern slopes of Eyjafjallajökull, the volcano famous for its 2010 eruption that disrupted air travel across Europe.
That same eruption covered the pool in volcanic ash, which volunteers cleared the following year to restore it for visitors.
What makes Seljavallalaug different?
Unlike Blue Lagoon or Sky Lagoon, there are no luxury amenities, swim-up bars, or spa treatments. Not even an official website.
Reaching the pool requires a scenic 15–20 minute walk from the parking area, following a rocky path through the valley.
And here’s something important to know before visiting: the water isn’t necessarily hot hot.
Depending on the season and geothermal flow, temperatures can range from approximately 68–95°F (20–35°C). Some sections are warmer than others, but don’t expect the consistently hot water of a traditional geothermal spa.
The pool also receives minimal maintenance, so algae and slippery surfaces are common.
For many visitors, the real attraction is the scenery and history rather than the swimming itself.
Why you might choose it: Seljavallalaug offers a combination of Icelandic history, mountain scenery, and a little adventure. It’s especially appealing if you’re already exploring the South Coast.
Things to know before visiting:
- Admission is FREE (but of course you have to pay for parking)
- No reservations required
- The walk takes approximately 15-25 minutes each way
- There are basic changing shelters but no showers, restrooms, or lifeguards.
- Water quality isn’t routinely monitored, and swimming is at your own risk.
- It’s conveniently located between Seljalandsfoss and Skógafoss waterfalls.
Verdict: Seljavallalaug is worth considering for its dramatic scenery and fascinating history alone. Just remember that it’s a historic outdoor geothermal swimming pool, not a luxury hot spring spa.
Is It Worth Visiting More Than One?
Absolutely!
If your itinerary allows, I wouldn’t limit yourself to just one. After all, each offers a completely different experience!
If I could only choose two: I’d recommend Blue Lagoon and Secret Lagoon. They’re different enough that visiting both doesn’t feel repetitive, and together they offer the perfect combination of iconic luxury and traditional Icelandic bathing culture.
If I could add a third: That’s where your travel style comes in!
- Sky Lagoon: For a luxurious wellness experience with incredible ocean views.
- Hrunalaug: For a more rustic experience surrounded by Icelandic countryside.
- Seljavallalaug: For adventurous travelers who don’t mind a scenic hike to a historic mountain pool.
Bonus tip: If you’re already visiting Secret Lagoon, consider adding nearby Hrunalaug to your itinerary. They’re close enough to make visiting both relatively easy!
Ultimately, the best hot spring in Iceland isn’t necessarily the most famous or expensive. It’s the one that fits the kind of experience you’re looking for.
And if you have time to visit more than one? Even better!
After all, part of the magic of exploring the Land of Fire & Ice is discovering just how awesome each experience can be.
Iceland Hot Spring Etiquette: A Few Things to Know Before You Go
Before you take the plunge, there are a few things worth knowing about Icelandic bathing culture that might surprise first-time visitors!
Shower before entering: In Iceland, cleanliness is taken seriously! At public swimming pools and many geothermal spas, you’re expected to shower completely naked before putting on your swimsuit. Don’t worry—larger spas like Blue Lagoon and Sky Lagoon offer private shower facilities. More rustic natural hot springs may have limited facilities or no showers at all, so always follow the rules at each location.
Protect your hair: If you’re visiting Blue Lagoon, this tip is especially important! The silica-rich geothermal water can leave your hair feeling incredibly dry, stiff, and difficult to manage. Before entering, apply plenty of conditioner (provided complimentary at Blue Lagoon), tie your hair up, and try to keep it out of the water. Trust me, your hair will thank you later!
Respect the experience: Iceland’s geothermal pools are places to relax and unwind. Be mindful of other visitors, respect their privacy in changing areas, and avoid using lotions or soaps directly in natural hot springs. At more remote locations, remember to leave no trace and take everything you brought with you.
One final tip: Bring a swimsuit, towel, and a waterproof bag for your wet belongings. While luxury spas often provide towels, smaller and more rustic locations may not.
Until next time, @thetravlingcoats
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