Island where motor vehicles are banned -- home to the only carless highway in the United States.

There aren't too many operational funiculars around, but Pittsburgh has two!

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

A building so large that it has its own weather.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

A fitting attraction for the corn capital of the world.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Golden Gate Park's historic collection of plants.

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

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Look closely and you’ll notice that the color changes a third of the way up the tower.

This former coal gasification plant found a curious second life as a popular public park.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Less a museum than a bizarre fantasy world created by artists and engineers.

The world's longest known cave system.

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

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

The first declared National Monument in the United States.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.