The lake-filled Quilotoa volcano, Ecuador 26 May 2017
About this photo
Still, blue water fills the caldera of Quilotoa for a breathtaking aerial view. Quilotoa is the most western volcano in the Ecuadorian Andes, the so-called 'spine' of Ecuador. The 3km (2-mile) -wide lake was formed by the collapse of the volcano about 800 years ago; the collapse followed a catastrophic eruption, and lava flows reached the Pacific Ocean and ash flew into the atmosphere. This eruption followed a 14,000-year period of dormancy. Discover the delights of Ecuador, from the historical cities to the adventures of the Andes on any of Insight Guides' trips to Ecuador.
This article was originally published on 22nd September, 2015