An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A mechanized clock where a man fights off a dragon, crab, and rooster.

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

St. Francesca Romana, patron saint of drivers, resides in the church she founded.

The fountains of the U.S. Navy Memorial are annually salted with water from the Seven Seas as part of a nautical ritual.

Fascinating museum dedicated to the under-appreciated medical history of urology features some wince-inducing devices.

This outdoor observatory offers stellar views and a scale model of our solar system.

A unique collection of old miners' cave homes carved in to the hillside cliffs near Death Valley.

Fears of Satanic worshippers swirl around five Celtic-inspired megaliths.

A mammoth pair of Civil War artillery guns abandoned out in the forest.

Originally dubbed "Retirement" by the Navy Commodore who built it in 1780, this beautiful mansion is now the centerpiece of a suburban community park.

This sprawling farm was once a Cold War-era hideaway for the nation's top diplomats.

This historic castle is one of the oldest and most impressive in all of Japan.

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

Built some 700 years ago, this Taíno ceremonial site features ball courts, petroglyphs, and evidence of ancient astronomy practices.

The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

A museum dedicated to the lovable crime couple Bonnie & Clyde, just a few miles away from the site of their early demise.

In 1952, a strange encounter in the woods of West Virginia led to the legend of a 10-foot-tall monster with glowing eyes and a distinctive style.

More than 500 unique and specially designed cases collected by D.C.'s "Harmonica Case Man."

Exact replica of the ancient monument, but much, much lighter.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

Paranormal investigators claim this abandoned asylum is the most haunted spot in the eastern U.S.

This old-fashioned carhop restaurant gave the world the waffle cone.