A statue of Paulina Hermann, the eccentric noblewoman known as the "mother of cats."

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

During the 19th-century, this park was a vital trading fort.

At just six feet two inches deep, it is said by Guiness and Ripley to be the world’s narrowest freestanding office building.

This abandoned mine and power plant was built atop land once given to Revolutionary War soldiers.

Four alabaster giants contemplate the tides on the shore of Denmark.

Hans Christian Andersen for the postmodern world.

A walkable map of the world, made from soil and stone by one man.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

The site of a tragedy in 1908 that claimed the lives of 171 people and changed fire safety laws across the state.

This small-town pizzeria won the Hollywood lottery.

The graves of a Connecticut family thought to have been plagued by a vampire.

The world's largest indoor go-kart racetrack is hiding in Connecticut.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

A true treehouse near Hawai'i Volcanoes National Park.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

These ancient sacred grounds granted amnesty to those who managed to reach them.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

Huge masonic hall in Philadelphia with lavishly themed rooms.