Walk through Czech history in Prague's largest graveyard.

The underground sanctuary of a mysterious ancient cult.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The island of Lanai in Hawai'i is a paradise for cats and cat lovers.

This house's itty bitty size means no humans allowed.

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

Back in the day everyone who was anyone played this historic western theater.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

How would you like to dine in the same room where some of the Titanic's victims were embalmed?

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

A Neolithic burial site built 1,000 years before Stonehenge.

A quaint medieval millhouse hovers surprisingly above the waters of the Seine.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

A bronze kitty adorns the grave of the polar explorer who brought the original feline to the Antarctic.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.