Limestone arches over hidden pools.
Town beneath an active volcano.
Walk through a forest of razor coral pinnacles to a ladder that drops into a hidden sandy oasis with palm trees between the cliffs.
Jagged coral pinnacles of the interior.
Dunes of seven natural colours.
The "Eye of the Sahara" from the ground.
Forest of razor-sharp limestone, UNESCO-listed.
Eerie "Devil's Town" rock spires.
Striped, dome-shaped rock formations.
Red sandstone amphitheatres carved into the coastal plateau north of Pointe-Noire.
Waterfall dropping through three natural bridges into a cave shaft.
Young fissure volcano between spreading tectonic rifts.
Otherworldly landscape of limestone chimneys.
Bubbling grey cones on the Caspian steppe โ half the worldโs mud volcanoes are here.
Eroded "moon landscape" near the coast.
Neon sulphur pools, salt flats 125 m below sea level and the Erta Ale lava lake โ the hottest inhabited place on Earth.
Eroded clay badlands a stoneโs throw from the city.
Drift by boat beneath a cave ceiling lit by thousands of glowworms.
Wind-carved chalk mushrooms and icebergs of rock glowing at sunset โ camp overnight under the Sahara stars.
Drift between the American and Eurasian tectonic plates in gin-clear glacial water.
Mineral springs that have petrified into white waterfalls of stone above the Oaxaca valleys, with cliff-edge pools you can swim in.
The highest tides on Earth, best watched among the Hopewell Rocks flowerpot stacks.
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