Waw an Namus, Oasis of Mosquitoes, is a volcanic field, cone and caldera in southern Libya, deep in the Sahara Desert. The inside of the caldera houses an oasis of rich foliage and three small salt lakes of variable color which are the reason for the volcano’s name. A volcanic field of dark basaltic tephra flow extends 10–20 kilometres (6.2–12.4 mi) around the caldera. The dark field’s vast size allows it to be easily seen from space. Due to the fresh water at the volcano, Waw An-Namus was always an important watering point for the caravans.
info: wikipedia
By NASA’s Earth Observatory – The Operational Land Imager (OLI) on Landsat 8 (http://earthobservatory.nasa.gov/IOTD/view.php?id=86054), CC BY 2.0, Link
By Rolfcosar – Own work, CC BY-SA 3.0, Link
By ruba_ch(Flickr profile)/Rudolf Baumann – http://www.flickr.com/photos/ruba/78504272, CC BY 2.0, Link
By Rolfcosar – Own work, CC BY-SA 3.0, Link
e MORFES 
Incredible and só beautiful!
Incredible place and images! I have never seen anything like this before!
Beautiful pictures!
Beautiful pictures but Oasis of Mosquitoes does not sound like a place I ever want to go to, lol.
Amazingly beautiful !