The vast, legendary catacombs hold secrets much stranger than stacked bones.

2300-year-old Roman road connecting the empire.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

An overlooked memorial honoring the local Washington residents who died in World War I.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Inside the unassuming cemetery chapel is a magnificent stained glass window and mosaics.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Send a postcard while vacationing with Satan.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Former villa and estate of James Deering developed to preserve native tropical forests.