The solemn exterior conceals an opulent interior of this 17th century church.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

A mechanical clock built in 1914, with a rotation of 12 historical figures on its face.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Gods clash with machines in a power plant regenerated as a museum.

A collection of colorful dinosaurs hidden in an actual rainforest.

According to legend, this rock represents a young girl trapped by an evil ocean spirit.

On the Oregon coast is a natural hole that seems to be draining the sea.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A vertically floating hemlock controls the waves and weather at Crater Lake.

This abandoned motel doesn't welcome guests anymore, but decay and a creepy atmosphere still call it home.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

Watch cheese-flipping robots in action at this factory and museum.

Constructed along the shores of Lake Zurich, this pavilion is a walk-through work of art.

Swiss vineyards in a UNESCO heritage site.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

Tucked away amidst some of the most famous addresses in the world is New York’s only fraction of a street.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.