A tiny church on a man-made island in the Adriatic.

A curious cave church carved into the face of a cliff.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

This antique thermometer honors the creator of the first universal temperature scale.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

These rare statues are one of the few remaining material witnesses to Old Prussian culture.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

This abandoned Slovenian military barracks has become a punky-political art squat.

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.

A museum dedicated to the alleged Roswell Incident.

Two distorted Romanesque columns hold aloft a mine cart in honor of laborers who died during WWII.

A futuristic, brutalist masterpiece that is also strangely prison-like.

A 11-foot former president stands on a Kosovo street that also bears his name.

A father's love for his son has weathered the test of time in this whimsical garden of outsider art.

Aliens and monsters lurk inside this museum dedicated to one man's lifelong adoration of all things sci-fi.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.