Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

At this unusual park, domes, ladders, chairs, and more are made from trees.

This extensive nuclear fallout shelter built from 42 school buses could house 500 people in its tunnels.

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

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

The world's tallest box hedge is found in a delightful garden.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

A public display of prehistoric space rocks is named for the Namibian village where they were found.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

The steepest classic funicular in the world glides along a dizzying incline.

These two giant boulders mysteriously perched on a 60-foot cliff may have been slung up there by a raging tsunami.

A massive land art sculpture fills a green space once tarnished by a landfill.

This strange moor has a song written about it, Bronze Age carvings, and an alien sighting.

An eerie collection of the surviving structures from a past celebration of the future.

The bartenders at this crime-fighting theme cafe are actual private detectives by day.

An unrealized Taoist palace left abandoned in a Houston suburb.

Did Inca children also slide down these smooth rocky slopes above Cusco?

This unimaginably large pile of sand near Nazca is one of the tallest dunes in the world.

The labyrinthine home of the National Archives of Estonia is an experimental blend of architecture, art, and history.

One of the largest collections of socialist realist art shows the surprising depth of the official art of the Soviet Union.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

The basement bowling alley of this St. Paul dive bar is decorated with thousands of dollar bills.

A fantastical and futuristic temple of light built from nine monumental glass veils.