A quick and simple solution to Cambodia's train woes.

A battle between nature and architecture in the Cambodian jungle.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

Mysterious hillside with a continuously burning natural fire.

When you've got to go, you've got to go.

This attraction was abandoned after the Chernobyl disaster.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

Unfinished monument to peace between Turkey and Armenia, long divided by a dispute over genocide.

Roman ruins top white travertine terraces formed by ancient hot springs.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

This lovely little bridge hidden in a Switzerland gorge is essentially a fairytale.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

Frequent fliers welcome in this airplane hotel.

Street artists transformed this abandoned industrial neighborhood into one of Europe's largest graffiti exhibitions.

Micro-nation based around a nine-story high illegally built tower.

The world's first ice hotel is still one of the most elaborate and beautiful.

Bring your hiking shoes, wool socks, and thermal underwear for a stay in these cozy forest huts.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.

This one-time health resort was used by aristocrats around the world.

A perfectly preserved hill village where the buildings are painted like white lace.

A unique hotel for the artistic soul.

Church built on the site where the last tsar of Russia and his family were killed.