A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

A bizarre roadside attraction and the first instance of miniature golf in the world.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

Catacombs turned marketplace.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

A mysterious castle built as a monument to lost love.

See massive fossils that are over 200 million years old in northeastern Arizona.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

This former lieutenant governor's home is brimming with curiosities.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Quite simply the largest tree in the world (by volume).

Eighty million natural history specimens call this gargantuan museum home.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

The curiosities and wonders of pharmacy in a delightful historic building.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.