A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.

Berlin's old airport.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

Elvis's own personal tropical hideaway.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

The only rotating bar in New Orleans has been slowly spinning since 1949.

This float factory takes the mask off of Mardi Gras and lets visitors see where the magic happens.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Home to items never before seen by the public.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Tucked in the back of this amazing antique store is an important piece of medical history.

Elevated freight railway turned wildly successful urban park.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

Historic funicular railway, believed to be the shortest railroad in the world.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."