reykjanes · Iceland
Blue Lagoon
Blue Lagoon is a geothermal attraction in Capital Region. Experience Iceland's powerful geothermal energy up close at this remarkable natural site. The area features hot springs, steam vents and mineral-rich waters that showcase the raw volcanic forces beneath Iceland's surface.
About Blue Lagoon
Blue Lagoon is a geothermal attraction in Capital Region. Experience Iceland's powerful geothermal energy up close at this remarkable natural site. The area features hot springs, steam vents and mineral-rich waters that showcase the raw volcanic forces beneath Iceland's surface.
History & Background
The Blue Lagoon is not entirely natural — it formed accidentally in 1976 from the run-off water of the nearby Svartsengi geothermal power plant. Workers at the plant noticed the warm mineral-rich water accumulating in the lava field. Locals began bathing in it in 1981 after noticing it helped their psoriasis. The spa was officially opened in 1987 and has since become Iceland's most visited tourist attraction. The water is rich in silica mud and mineral salts with documented healing properties for skin conditions.
Key Facts
- ✔Formed accidentally from geothermal power plant run-off in 1976
- ✔Water temperature maintained at approximately 38–40°C
- ✔Rich in silica, sulfur and algae with skin-healing properties
- ✔Iceland's most visited tourist attraction
- ✔Located near Keflavík International Airport — easy to visit on arrival or departure
Tours Near Blue Lagoon
Best-rated Iceland experiences — book with free cancellation
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Book NowAbout Blue Lagoon
The Blue Lagoon is Iceland's most famous geothermal spa, set in a dramatic lava field on the Reykjanes peninsula. The milky-blue water, rich in silica, algae, and minerals, maintains a comfortable temperature of 37–40°C year-round. Visitors can apply complimentary silica and algae face masks while soaking. The complex includes a restaurant, spa treatments, and the high-end Retreat Hotel. Pre-booking is mandatory as the lagoon has capacity limits. The water originates from the nearby Svartsengi geothermal power plant and is renewed every 40 hours.
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Book NowHistory & Background
The Blue Lagoon is not entirely natural — it formed accidentally in 1976 from the run-off water of the nearby Svartsengi geothermal power plant. Workers at the plant noticed the warm mineral-rich water accumulating in the lava field. Locals began bathing in it in 1981 after noticing it helped their psoriasis. The spa was officially opened in 1987 and has since become Iceland's most visited tourist attraction. The water is rich in silica mud and mineral salts with documented healing properties for skin conditions.
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Book NowStory & Folklore
The Blue Lagoon is one of the most recognised attractions in the world — a milky-blue geothermal pool surrounded by black lava, 50 minutes from Reykjavík. What visitors often don't know is that it's man-made: the water comes from the Svartsengi geothermal power plant, which has been running since 1976. The outflow water — rich in silica, algae and minerals — was initially drained back to the lava. Local swimmers noticed the water had beneficial effects on psoriasis and moved in. The spa complex opened in 1981; today it's Iceland's most visited attraction. The surreal milky colour comes from silica nanoparticles suspended in the geothermal brine. The adjacent eruptions at Grindavík (2023–2025) forced temporary closures and added an extra layer of volcanic drama.
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Book NowVisitor Information
Best Time
Year-round, less crowded on weekdays and early morning
Duration
2–4 hours
Access
20 minutes from Keflavík Airport, 50 minutes from Reykjavík. Bus service available. Must pre-book.
Why Visit
Top-rated tourist attraction with in-water bar and silica masks
Hidden Gems Nearby
Steam Patterns
Watch how the steam patterns change with wind direction and temperature throughout the day.
On cold mornings, the steam is most dramatic, creating an otherworldly atmosphere that photographs beautifully.
Mineral Colors
Notice the vivid colors around the geothermal features — yellow sulfur, red iron oxide, and green algae.
These colors represent different minerals deposited by the hot water, creating a natural palette unique to each hot spring.
Bubbling Mud Pots
If present, the bubbling mud pots are mesmerizing to watch — each bubble is a small volcanic event.
The mud is created by acidic steam breaking down the surrounding rock, and each site has a unique bubbling rhythm.
Practical Information
Best Time
Year-round, less crowded on weekdays and early morning
Duration
2–4 hours
Access
20 minutes from Keflavík Airport, 50 minutes from Reykjavík. Bus service available. Must pre-book.
Frequently Asked Questions
Is it safe to touch the geothermal water?▾
Never touch geothermal water unless at a designated bathing area. Water temperatures can exceed 100°C and cause severe burns.
Can I visit geothermal areas year-round?▾
Yes, most geothermal areas are open year-round. The steam is even more dramatic in cold winter weather.
Do I need to stay on boardwalks?▾
Yes, always stay on marked paths and boardwalks. The ground near geothermal features can be thin and unstable.