With a surface area of nearly 500 square meters, welcome to the world's largest paraboloidal dish solar concentrator.

This copper-coated, multi-arched dome is surrounded by a moat and lights up at night.

The gigantic preserved heart of a champion racehorse.

It's home to the antenna that received the first images of Neil Armstrong walking on the moon.

More than 10,000 small mirrors cover the curved surface of the world's second-largest solar oven, located in a remote village in Uzbekistan.

NASA's leading space science lab started by a co-founder with deep ties to the occult.

This California estate was either haunted by ghosts or the Marx brothers.

In one man's basement, the world's largest collection of Kansas City Chiefs memorabilia is on display.

The body of an unidentified woman, visible through a glass coffin, was discovered by accident.

It took over 100 years to decode this enigmatic epitaph for two buried brides.

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

A mother’s sweet tradition lives on with this unique memorial.

This lonely gravestone beside an auto parts store is a reminder of the hardships of a pioneering past.

Inside this small brick bungalow is a collection of toys intended for the afterlife.

A father’s love is immortalized by a unique dollhouse marking a young girl’s grave site.

Freddie Mercury's childhood home is now a monument to the iconic Queen rockstar.

A small, emotionally charged room inside the Mario Testino Museum dedicated to Princess Diana and one famous photo shoot.

The pioneering photographer's prints are immortalized inside her childhood home.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

Although it has never been a secret ninja base, this shrine still has plenty of tricks up its sleeve.

There's an old indoor swimming pool hidden directly underneath the White House Press Briefing Room.

D.C. once had its own tiny rival to the New York Stock Exchange.

Where the U.S. government kept its actual treasure, before Fort Knox.

Two planes stand abandoned after the closure of an aircraft-themed restaurant.