Four-story concrete hotel never opened to customers.

Mysterious tombstones thought to be remnants of Atlantis.

The 3,600-year-old archeological sensation is considered to be the oldest representation of the cosmos.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

A neolithic dolmen that was rebuilt after collapsing during the 19th century.

A circle stone within a stone circle.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

The relics are stored in a silver reliquary, where they can be seen through glass.

Glasgow’s piece of the patron saint of love.

Inside this church are the alleged remains of the patron saint of lovers, epileptics, and beekeepers.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

This family tattoo parlor has been inking religious pilgrims in the Middle East for 700 years.

Some 20,000 dust-covered unwanted vehicles languish in the desert.

A giant gun barrel in Barbados that once hoped to shoot outer space with science.

Budapest's Communist-era statues, banished to the suburbs.

Two monstrous faces loom over a village in Czechia.

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

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.