This sublime architectural marvel is a rare example of an expressionist church.

Ruins and statues dot the landscape of this tiny island rich with royal history.

These colorful French islands spent a stint bootlegging booze during American Prohibition.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Locals spent years successfully fighting to save this beloved Brutalist behemoth from demolition.

A stunning Catholic cathedral built by a curve-loving communist in Brazil’s newly created capital.

The hellish conditions of this abandoned mine that snakes beneath the Pacific Ocean gave it its diabolic name.

Ernest Hemingway was the first to sign this colorful wall covered in thousands of celebrity signatures.

A rare tour of an aristocrat's private home reveals valuable 17th-century paintings from artists like Rembrandt.

Eerie ruins of an abandoned medieval fishing village crumble atop an unforgiving stretch of earth.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

A simple tribute to the microscopic arachnid that gives its juices and its life to help make a speciality German cheese.

A bike train runs along a disused railway line through the tranquil French countryside.

The morbid items in this small and hidden museum are not for the weak stomached.

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

A massive natural rock arch gives the Tuscan mountain its own window to the sky.

The remains of a magnificent medieval fortress that was the capital of a vast empire.

A quirky collection flush with information on commode culture from ancient times to modern day.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

An oddities shop packed with twisted treasures inspired by Oscar Wilde and Edgar Allan Poe.

This hulking behemoth is actually five interconnected towers built in the 1960s.