Europe’s most active volcano, guided to 3,300 m past steaming vents and last year’s lava.
Africa's third-highest peak, glaciated and on the equator, at the top of the Rwenzori.
Climb the iconic volcanic spire.
Cross one of the Sahara's emptiest expanses.
Swim at the very edge of Victoria Falls.
Trek to the world's second-largest hot lake.
Wind-carved kalut ridges in one of the hottest places ever measured on Earth.
Home of Son Doong, the world’s largest cave, plus Paradise Cave and boat trips into the river cave of Phong Nha itself.
Drift between the American and Eurasian tectonic plates in gin-clear glacial water.
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