The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A heavenly experience, right here on Terra Firma.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

A 30-acre garden inspired by the principles of modern physics.

A dilapidated dock tells the story of Titanic's missed arrival.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

The rocks in this arid basin leave trails of movement behind them.

Where manatees are the snowbird vacationers in these balmy Florida springs.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The first declared National Monument in the United States.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A beautiful 62-acre Catholic shrine and botanical garden.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The United States Capitol's former columns still stand.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.