Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

The original Uncle Sam was actually a New York meatpacker who is buried under this historic grave.

An eerie and beautiful group of columns mark the site of a grand mansion lost to time and fire.

A miscalculation turns a very shallow freshwater lake into a very deep saltwater lake.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

Despite being made of a seashell mortar, the crumbling remains of this historic Florida mill are still standing.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

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

The ancient settlement attracts tourists from all over looking to learn about the Chinese vision of the afterlife.

A bizarre house filled with an astounding array of collections.

The Ozarks' strangest dwelling.

A spiritual vortex among the red rocks in Sedona.

Abandoned silver mine strewn with wrecked and twisted structures.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

A museum of unusual collections, mini-towns, and a half-dog, half-alligator.