Cold war icon and onetime "hole" in the iron curtain.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

The youngest volcano in Central America.

Palace where the nearly un-killable Rasputin was murdered.

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

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

It houses the remains of a 17th-century version of the Titanic.

A miniature train-ride through Slovenia's largest cave system.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Thousands of well-dressed mummies below a monastery.

A motel dedicated to Southwestern nostalgia.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

A historic hotel on the edge of the Australian outback.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

An eatery for UFO seekers on the Extraterrestrial Highway.

A giant donut stands as a popular symbol of Los Angeles iconography.

World-famous, Pink's still manages to keep its prized cult fetish status.

A 1,500-year-old ghost settlement is slowly fading away.

The Uros people live on floating reed islands in lake Titicaca.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

An unexpected desert oasis in South America.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.