The Azores is a group of 9 islands in the North Atlantic Ocean; it’s an autonomous region of Portugal. Corvo, the smallest of the Azores islands boasts of a population of around 400 people but over a thousand cows. The Caldeirão is the remains of an ancient volcano. You can hike this trail!
I don’t know who the photographer is, but TinEye says this image first appeared on the web in November, 2013, at Enjoy Portugal Holidays.