The restaurant keeps a hidden séance room on the second floor and reserves a table for the spirit of the former owner each night.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

This semi-secret storybook hedge maze is also the oldest garden in the city.

This frequently-photographed waterfall takes only a short hike to visit.

One part local history, 99 parts gruesome haunted house.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Make your reservation to have coffee with some kitties.

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

The beautiful baroque library of the Hapsburg empire.

Tokyo’s only Vaudeville-cuckoo clock–steampunk-Victorian curio cabinet time piece.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Ride the subways of yesteryear.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A Jenga-style cylindrical tower of books that appears to go on forever.

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

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

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 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Two stunning 17th-century libraries and a cabinet of curiosities.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

The fairy tale castle of the "fairy-tale king."