The Blue Lagoon is a geothermal spa in southwestern Iceland. The spa is located in a lava field near Grindavík on the Reykjanes Peninsula, in a location favorable for geothermal power, and is supplied by water used in the nearby Svartsengi geothermal power station. The Blue Lagoon is approximately 20 km (12 mi) from Keflavík International Airport and is one of the most visited attractions in Iceland.

Grindavík is one of the nation's strongest fishing industry townships, and home to well-established processing plants and a large fleet of fishing ships. Situated in a dramatic landscape of lava fields right next to the Atlantic Ocean, Grindavik boasts breathtaking natural beauty with priceless gems of nature, such as Eldvörp, Selatangar, Gunnuhver, Brimketill, the fierce lava, the Reykjanes Light House, and much more. With the Blue Lagoon, the nation's most popular tourist destination, on it's doorstep, Grindavik has enjoyed a tremendous growth in tourism. The area surrounding Grindavik offers endless opportunities for adventure, from dramatic hiking trails, to bird-watching from the cliffs along the shore of Reykjanestá.

In the middle of the fissure on the Mid-Atlantic Ridge (in the south of Reykjanes) is the geothermal area Krysuvik. The banks around the hot springs are coloured green, yellow and red. Columns of steam rise skywards and the bubbling mud pools play their rhythmic symphony. Hikers can find a winding path leading to the top of the massive steaming vent, the view from the top is spectacular, of both the ocean, the geothermal fields and the lakes. A few lakes are beside the mudpots and sulphur deposits. The Krysuvik Geothermal Area of the Reykjanes Nature Reserve is where visitors can experience geothermal power in a more natural setting with boiling mud springs surrounding the world’s largest blowing steam vent.