This crocodile-infested East Timor reservoir is also home to a spectacular half-sunken forest.

The bridge continues the legacy of President Franklin D. Roosevelt's New Deal policy.

This gravelly, dangerous highway is the only road in the United States that leads to the Arctic Ocean.

A century-old magnolia tree is the only living landmark tree in New York City.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

The home of Ireland's last leprechauns is officially protected by the European Union.

A dictator's failed public works project has been reborn as two linked trails through spectacular scenery.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

The beehive-like buildings of this abandoned resort reside near the border of Mauritania and Senegal.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

An abandoned skate park located in the middle of the wilderness.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

The easternmost town in Alaska can only be accessed from Canada.

Hidden on the 7th floor of a historic building, this Cajun spot features wall-to-wall bottles of hot sauce.

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

Ride in 1960s style on the private luxury train Marshal Josip Tito used to travel around Yugoslavia.

The oldest operating steam locomotive in Canada runs along this heritage railway.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

An abandoned jewel of a ballroom on the top floor of Australia’s busiest rail station echoes with the sounds of a bygone era.

The famous facade of Grand Central Terminal hides a regulation tennis court, and it's not the first one.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.