The Erta Ale volcano, in the heart of the Danakil Depression in Ethiopia, is one of only five active lava lakes in the world. Located in a very harsh environment, where temperatures frequently reach 45°C / 113°F or more, the landscape is covered by black volcanic rocks for miles around. After a hike to the rim of the crater, it is a short walk inside the crater to the very edge of the lake. A mesmerizing show, better seen throughout the night.
No matter how many times you see pictures of Uluru (or Ayer's Rock), as here lit by moonlight during full moon with the Kata Tjuta (the Olgas) in the background, seeing it in real remains impressive.