A trio of keyhole-shaped burial mounds restored to their ancient glory.

A familiar otherworldly creature guards this 12th-century Scottish abbey.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

Every summer West Seattle experiences a housing bloom.

One of Detroit’s oldest blues clubs stands in defiance of the passage of time and the city’s shifting fortunes.

A series of sculptures beneath the waves promote ocean conservation and support coral reefs.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

The only thing sweeter than the potatoes is the canine proprietor of this roadside stall.

The oldest candy store in the world has been selling traditional sweets since 1827.

This medieval hilltop village was abandoned at the end of the 19th century, after existing for more than 500 years.

148 feet long and in the middle of a verdant forest.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

One of the earliest depictions of an Arthurian scene that is shrouded in mystery.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

An architect transformed this abandoned cement factory into his castle-like workshop.

Spend the night in this formerly abandoned traditional Scottish village.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

The “Sistine Chapel” of the Middle Ages merges 11th-century science and religion in wondrous hues.

This amazing 15th-century mural remained hidden in plain sight for centuries.

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

Virgil's many-mouthed gateway to the underworld.

Steaming blood-red hot spring from hell.

The world's toughest modern Christian pilgrimage leads directly to the gates of Hell.