Global Volcanism Program | Image GVP-12783
The 3-km-wide Quilotoa caldera resulted from several collapse events and contains a turquoise lake approximately 250 m deep. Intrusions and lava domes are exposed within the crater walls, with the largest being 1.3 km diameter and 400 m high in the ESE wall visible on the far side of this 2015 photo. Behind the caldera rim is the Interandean Valley.
Photo by Ailsa Naismith, 2015.
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.