The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

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

The half-mile long structure is so impressive, it even shows up on satellite images.

This hulking behemoth is actually five interconnected towers built in the 1960s.

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

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

Where condemned pirates met their grisly end at the gallows on the River Thames.

When the town wouldn't allow the fast-food behemoth to build a new restaurant, they put one inside an 1850 home.

A home built with marble tombstones from the graves of 2,200 Union soldiers buried in a Virginia cemetery.

A forest of immensely tall and unusually straight oak trees planted nearly 200 years ago to build naval ships that never came to be.

Florence’s mother built a stairway down to her daughter’s coffin so she could comfort her during storms.

A network of fortifications that never saw conflict.

The island where one woman reigned as a "queen" over 30-odd Japanese soldiers who refused to believe that WWII had ended.

Rusty pieces of metal jutting out of a breakwater are all that's visible of the 12,500-ton ocean liner that capsized just off the beach.

French prisoners carved these boats from the bones of their meat rations.

A stranded woman lived alone on this remote island for 18 years, inspiring the great children's novel "Island of the Blue Dolphins."

The world's first commercial spaceport is a disappointment of cosmic proportions.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

"I did this all while you were watching TV."

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A multi-storied adobe complex has been inhabited for more than a thousand years.

Legends surround this jagged rock formation in the New Mexico desert.

These aggressively sustainable art homes look like something out of 1970's science fiction.