A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A psychedelic labyrinth on the San Francisco bay.

A huge musical instrument played by the ocean.

A sacred Ojibwe site covered in pictographs next to Lake Superior.

These strikingly barren, rolling red hills were caused by bad farming practices.

Little island known for its massive beachfront "flowerpot" pillars.

One of the most spectacular 18th-century bridges in Scotland.

Once home to one of the oldest banks in the world, this building is also where Marco Polo's famous travelogue was written.

The Grand Mall in Varna hosts one of the biggest collections of Soviet-era paraphernalia in Bulgaria.

This 6th-century church honors St. Tudno, the patron saint of Llandudno.

This 16th-century monastery was founded to cloister the daughters of wealthy local families.

These precariously placed ruins harken back to a 13th-century castle.

A jazz band formed by African water animals in the heart of Flemish Brabant.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

This ancient abbey now lies in majestic ruin behind a caravan park.

The sacristy of this church contains remains and relics of members of the Aragonese royal family.

Legends surrounding this megalithic tomb range from giants to a dwarf named Trollid.

More than 300 years old, Kyoto's historic "teahouse" still operates as an invitation-only geisha club.

This Neolithic passage tomb forms part of a World Heritage Site.

This hermitage celebrates the legend of Emperor Constantine's healing from leprosy.

Inside this old train depot resides a multi-line model train covering western North Carolina.

Unusually, this ancient Iron Age broch has never been excavated.

This museum explores the history of stickers and is home to RePEELed, an exhibit featuring sticker art from around the world.