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

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

This network of tunnels housed an entire village for years, and even had a hall for screening movies.

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

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

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

This Vietnamese hell cave lets visitors take a walk through a devilish underworld full of demons.

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

A huge maze complex and whimsical miniature village in Tasmania.

The once-dying town of Sheffield, Tasmania has reinvented itself as a village of painted wonders.

Aqua white sand highlighted with fiery red rocks.

This historic Australian bridge was built by convicts with giant stone spikes to prevent cattle from falling off the sides.

One of the best beaches in the entire world.

This controversial museum includes such detested exhibits as a chocolate suicide bomber and fecal-smelling digestion machine.

Bronze statues honor the brave explorers who passed through this Antarctic gateway.

This simple sailing boat is one of the oldest preserved fishing vessels of its kind in the world.

The world's tallest shot tower—maybe.

This extraordinary geological oddity resembles human-made pavement.

Relics of Australia's convict past, and a modern scene of unimaginable horror.

The largest collection of Indigenous Australian artifacts in the world, and the rare museum where wood-and-glass cabinets have trumped interactive exhibits.

This historic tall ship traveled 1.5 million miles around the globe, and once did duty as the mythical pirate ship in Peter Pan.

The city’s oldest gateway to the galaxy lies at the entrance to the Royal Botanical Gardens.

A youth-centric science center hides an industrial triumph.