Limestone caves with spectacular showcase chambers.

What is the Thing?

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

The once highest point in China blends symbolic design with a kick of adrenaline.

Ming Dynasty necropolis raided during the Cultural Revolution.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

The world’s tallest outdoor lift stretches along the stone pillars that inspired the floating mountains in the movie “Avatar.”

999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

For those with no fear of heights: a skywalk 4,700 feet up on a Chinese mountain.

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

This water tower has been a staple of the Rochester skyline since 1931.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

A spiritual vortex among the red rocks in Sedona.

Stairs often replace streets on the steep slopes of this old mining town.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

Legend says train robbers stashed their gold within the depths of this unusual cave.

America's only nuclear missile silo open to the public.

One of the oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

Visitors to this public park will also find the ruins of an old western fort.

Miniature art that tells an enormous story.