Petrified Forest of Lesbos

A cooled lava flow from the Haleakalā volcano formed these surreal-looking columnar basalt structures.

Few people have ever heard of, let alone visited, one of Turkmenistan’s most impressive natural attractions.

Like Mars, but much closer.

An otherworldly, fossil-rich cobble beach holds Viking graves, cairns, and other remains.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

This towering volcanic plug stands out among the dramatic formations that dot this otherworldly desert valley.

An enchanting rocky island of scraggly baobabs surrounded by an ancient sea and sprawling salt pans.

Australia's only active volcanoes and highest peak are located on these remote islands thousands of miles away from the mainland.