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Tepui table-top mountains, Venezuela

There are 115 mesas in the Gran Sabana in the south-east of Venezuela on the border with Guyana and Brazil, where the highest concentration of tepuis is found. The precipitous mountains tower over the...

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Erta Ale Lava Lake trek, Danakil Depression, Ethiopia

Lava bubbles and oozes inside a lava lake in Ethiopia’s Ertale volcano. Molten surface temperatures range from 550 degrees Fahrenheit (288 degrees Celsius) to nearly 1000 degrees Fahrenheit (540 degrees Celsius) at the center...