This abstract sculpture is rumored to cast a hammer-and-sickle shadow once a year.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

This Las Vegas casino boasts one of only three spiral escalators in the United States—an engineering wonder.

An 1870s ranch for pioneers, rodeo stars, and divorcees was abandoned and left for dead, until the city reopened it for exploration.

Fans of vintage Vegas, kitsch, and toy pony-based gambling now flock to a casino called The D.

A giant open-air sculpture made of over 200 full-sized boats.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

Originally built as a promotional giveaway, this suburban house was designed to be an IRL version of the Simpson home.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

This semi-hidden Manhattan restaurant is based out of a loading dock.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

New York City's smallest piece of private property.

One of only two commuter aerial tramways in the United States.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Mysterious prehistoric grooves carved into the Maltese rock, purpose unknown

Local legend associates this large limestone chunk with a giantess, but archeologists say it may be the remains of a neolithic burial chamber.

This abandoned building, which is the second-largest structure on the Maltese island of Comino, has a complicated past.

Malta’s largest cemetery is a Victorian-era architectural masterpiece.

This church is named for one of the most dramatic tales in the early Christian church.