European castle ruins in an American state park are actually the product of death and grief.

Less a museum than a bizarre fantasy world created by artists and engineers.

Hidden in the back of a disused small town hotel is a dive bar shellacked with over a million pennies.

An extensive collection of fine art devoted to man's best friend.

A 140-year-old castle with underground caves hidden in San Francisco.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

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

A mechanized clock where a man fights off a dragon, crab, and rooster.

A haunting collection of the vanished and disappearing natural world.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

Paris' linguistic guide to the international language of, yes, love.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

The oldest stone house in Paris was built by its most famous alchemist.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A remnant of the 19th-century dream to discourage people from drinking booze by offering them water.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This 40-foot fowl marks the so-called "wild goose capital of the world."

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

One of the largest carillons in the world, this giant instrument has 67 cast-iron bells played by a keyboard.

The park that the Chicago Stockyards built.

Along this stretch of Indiana roadway resides a giant insect composed entirely of scrap metal.

2300-year-old Roman road connecting the empire.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.