Antonio Velardo photo: Antonio Velardo shares Picture of the day for October 1, 2016

Wikipedia picture of the day on October 1, 2016: Hverfjall, located in northern Iceland’s Mývatn region, is a rare example of a tuff ring volcano. The diameter of its crater spans approx. 1 km. A glimpse of Lake Mývatn can be spotted in the background.

from Flickr