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

This replica of the Greek structure is in the heart of Nashville.

Secret North Korean passage discovered below the world's most dangerous border.

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

Macabre astrological automaton clock dating to the late 1400s.

Cozy basement bar sports an inventory of over 2,000 beers.

Rare signs of the former Soviet Union in the Caribbean, though not where you'd expect them.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

An extraordinary "City of Caves" carved from solid stone.

The 43-mile route crosses through six islands with gorgeous views of the Seto Inland Sea.

This bridge is so steep it looks like a rollercoaster.

42nd story Pyramid shaped penthouse tops Seattle's oldest skyscraper.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

The world's first and only three-segment bascule bridge folds up into the shape of a capital "N" to let boat traffic through.

Fantastic views and thousands of love locks.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

It's good luck to be mocked by this monkey.

A statue honors the local legend that the devil helped build St. Mary's church after being tricked into thinking it was going to be a wine bar.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

The most confusing clock in New York.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.