A crucified and bearded female saint.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

During the Soviet era, the spire of this longstanding church was used as a radio transmission tower.

Within the Saudi Arabian desert lies a 2,000-year-old ghost town made of stone and mud.

Al Rahmah Mosque appears to "float" atop the Red Sea.

A 19th-century fortress and collection of artifacts offer a tour of Saudi history.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

This place bears witness to the loss of many lives during WWII, and stands in stark contrast to the American Cemetery.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

This sacred pool and its crocodiles have become popular tourist attraction where you can walk amongst the predators and even grab a selfie.

A battleship’s mast sits atop a turret-like memorial, commemorating those who lost their lives in one of the precipitating events of the Spanish-American War.

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.

A gift from Scotland to the United States in memory of the 270 lives lost when Pan Am Flight 103 exploded over Lockerbie due to a terrorist bombing.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

The rogue roots are gradually consuming some of the historic marble grave markers.

The "lovely red Vega" of the legendary record-settling pilot.

Holding the most bodies of any cemetery in the United States.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.