Image by Egill Bjarnason Lonely Planet

Soak in this broad, calm geothermal pool, mist rising and ringed by natural rocks. The walking trail along the edge of this lovely hot spring passes the local river and a series of sizzling vents and geysers. Surrounding meadows fill with wildflowers in summer. Increasingly popular, the lagoon gets packed with tour-bus crowds in mid-afternoon, so come earlier or later.

Swimsuit and towel rental are 500kr each. There's also an on-site coffee shop and fish and chip food truck outside. Find the lagoon signposted on the northern bank of the river Litla-Laxá in Flúðir.