The national park was once a plantation estate.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

People escaping slavery may have hidden inside a corpse vault.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

Many famous English poets including Elizabeth Barrett Browning are laid to rest at this Swiss-owned cemetery in Florence.

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The middle finger of modernity.

Eulogizing an unknown man's unusual demise.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

The sculpture of the deceased cockatoo flops atop its personal plinth.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.