A 1940s nuclear reactor built to produce plutonium for the Manhattan Project.

Hundreds of hopeful gold miners came here to get rich, but only two years later the small town was deserted.

The strange phenomenon causing gravity to "work backwards" on this hill has been blamed on the paranormal.

A museum dedicated to the history and art of staying clean.

A pocket of jungle amidst urban expansion in Panama.

Perched atop the highest hill in Cartagena, this 17th-century convent offers spectacular views of the city.

Malaysia's floating mosque.

Two thousand feline artifacts fill Malaysia's "Cat City."

This iconic clock tower is the largest in the Philippines.

These tiered rice paddies were carved into the hillsides 2,000 years ago.

The first declared National Monument in the United States.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

A museum dedicated to the history and exploration of both popular music and science fiction.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Most-visited and most-photographed slot canyon in the American Southwest.

A miniature city built by a single hunchbacked monk.

148 feet long and in the middle of a verdant forest.

One person’s lost luggage is another person’s treasure.

Time stands still at this serene burial ground in the center of Budapest.

Budapest's Communist-era statues, banished to the suburbs.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Museum dedicated to the terror regimes of Hungary.