The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

The spaceship-like theater, which is still in use, was one of the most popular exhibits at the 1964 New York World's Fair.

The haunting complex honors the millions of Ukrainians who died in the forced famine under Soviet rule.

Cherokee alphabet, proof of ancient North American Jews, or just a hoax?

The first piece of public art dedicated to LGBT rights.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

Summer in Scotland begins with a spectacularly wild and colorful event rooted in ancient pagan traditions.

Citizens of Norway want to gift the peak of Mount Halti to Finland for its 100th birthday.

Grand opera on a miniature scale.

Tombstones and enigmatic inscriptions hide within a vault beneath a popular London arts venue.

Tucked inside a South Bank bar is an epic expressionist chronicle of the 20th century.

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

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

A sinkhole and now a swimming hole, too, full of dazzling turquoise water.

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

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

A massive natural rock arch gives the Tuscan mountain its own window to the sky.