A shrine on the shores of the Tigris.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

A huge musical instrument played by the ocean.

A historic chapel filled with colorful murals and a colorful past.

The Dead Sea Scrolls were discovered in the ruins of this ancient monastic community.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

Ruins of a Carnegie family mansion on Cumberland Island.

Legend has it that seven Anglo-Saxon kings were coronated on this stone, located in the appropriately-named town of Kingston.

The last Viking king of Denmark is buried inside the crypt of this cathedral.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

This Gothic castle was inspired by Erik the Red's Viking residence at Brattahlid in Greenland.

A popular 19th-century natural landmark is now hidden within a sprawling forest.

This public library still showcases its former life as a 19th-century church.

At this historic pub, you can sit back, sip, and watch a whole century go by.

A pastry shop specializing in Sephardic sweets serves historic recipes in Ribadavia’s Jewish quarter.

This uniquely designed bridge served as the city gate for Comacchio.

Take a drunken tour inside the world's largest known geode.

The world's largest "Christmas tree" is illuminated by hundreds of lights stretching 2,000 feet up the slope of Mount Ingino.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Rediscovered in 1992, this abandoned medieval village once flourished by fishing and piracy.

The remains of Crystal Palace Great Exhibition of 1851.

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

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

This 15th-century structure had a long, tortuous journey to its current location.