A formerly glacier-tipped volcano that inspired none other than Jules Verne.

Three columns of volcanic rock shoot out of the ocean.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

The most powerful waterfall in all of Europe.

This elegant arc of a waterfall marks a religious turning point.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

This whimsically named Vietnamese stream is closer to a walkway than a waterway.

A desert in southeast Asia, complete with a beautiful lake covered in lotus flowers.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

A Surreal flight of architectural fancy in Vietnam's Central Highlands.

World's largest cave was only discovered in 1991, and now offers tours to the public.

Memorial to the father of the Republic of China.

This Taiwanese promontory is covered in otherworldly hoodoo formations.

An extraordinary natural landscape of mountains, waterfalls, and rocky cliffs riddled with tunnels.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

A mausoleum dedicated to a warrior felled by misplaced loyalty and tragic circumstances.

The largest Chinese cemetery in the world outside of China dates back to the 15th century.