This unreal Portuguese palace looks as though it's made from a pile of different castles.

An eclectic assortment of medieval architecture in a small Iowa town.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

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

The largest self-built castle in the U.S., six decades in the making.

A self-built castle made by a mysterious man.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

A Spanish artist builds his own castle.

The Vatican of the movie industry turned into an actual church.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Small island science organization offers public the chance to participate in research.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

The graveyard holds the remains of Irish immigrants who arrived in Queens after fleeing the Great Famine.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

The oldest pastificio in Queens offers visitors fresh noodles and a peek inside the macaroni-making magic.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The preserved house of a jazz legend still echoes with his music.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

This landmark building is now a vibrant performing arts space with musical acts from around the world.