See the Gobustan mud volcanoes

Neon sulphur pools, salt flats 125 m below sea level and the Erta Ale lava lake — the hottest inhabited place on Earth.

Otherworldly landscape of limestone chimneys.

Young fissure volcano between spreading tectonic rifts.

Visit Yanar Dag, the burning mountain in Azerbaijan, where natural gas fires have been burning continuously for centuries

A pentagonal caravanserai-temple built over a natural gas vent, used by Zoroastrians and Hindu pilgrims.

Walk lava landscapes and see active volcanic terrain in Hawaiʻi Volcanoes National Park.

Explore hydrothermal vents, lava domes, lakes, and volcanic peaks in Lassen Volcanic National Park.

The highest tides on Earth, best watched among the Hopewell Rocks flowerpot stacks.