A cave's rare beauty held a cavernous secret hidden underground.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

This grand gothic brewery has been pumping out suds for over a hundred years.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

The site where Poe “in great distress, and ... in need of immediate assistance” likely died.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Once the tallest building in the world and the site of “the highest dinner ever held in New York” this building now holds the most expensive penthouse in the city.

Prehistoric animals decorate this popular outdoor park.

Introducing the Green Fairy to her fawning masses.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

This massive subterranean fissure is known as the "underground Grand Canyon."

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

Rome’s legendary peephole vista is also a former Crusader stronghold.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

Started as a kitchen garden, now the second largest botanical garden in the world.