Although now a decaying ruin, this stone cabin's history includes several notable figures.

This mysterious petroglyph evokes the ancient swastika symbol but was later vandalized with the more troublesome Nazi one.

Native Americans built this circle of stones, which was used to predict astronomical events.

Over a thousand feet beneath the Detroit streets is a subterranean metropolis few are allowed to enter.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

This castle resides in a valley known for immense bloodshed during the Middle Ages.

The exterior of this home was used for the hit television show, The Brady Bunch.

These layered sandstone mountains in China look like they are made of pressed crayons.

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

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

After millennia of erosion by sand and churning water this Brazilian valley now looks like a lunar fantasy.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

A grove of "candelabra redwoods" deep in California's Lost Coast.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

A devilishly named gorge that was a sign of salvation for many pioneers.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

One of the largest open-pit copper mining operations in the entire country.

This oasis-like spring in the Sonoran Desert is home to unique, endangered species.

A cabinet of curious mathematical models and old calculators.

The remote resting place of a notorious Wild West outlaw whose death is shrouded in mystery.