Hidden just under the waters around this Turkish island are the ruins of a once great city.

A marvel of Byzantine engineering under the streets of Istanbul.

The only museum with its curator—and her pets—buried inside.

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.

Highly spherical boulders on the shores of New Zealand.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

The glacier tucked within a New Zealand rainforest.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

Tubing through a cave lit with glowworms is a magical underground experience.

A natural arch offers panoramic views of Yangshuo's karst hills.

300-year-old villagers houses and traditional churches preserve a nearly lost piece of Russian history.

St George's Leprosy Museum depicts the gruesome afflictions of those suffering from the disease.

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

Home to three historic ships from the age of Vikings.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Climb to the top of the world's largest seated bronze Buddha.

Limestone caves in the Cambodian countryside, once the site of genocide, now a place of peaceful beauty.

A gruesome memorial for those lost in this area during the Khmer Rouge genocide.

Khmer Rouge's high security prison.

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