The scuba diving training facility was named for the steam that rises from the cave's chimney.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

Nine Gardens in one—with tea service.

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

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

The remains of diamond fever taken over by the desert.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

In this century-old literary safehouse, print is alive and well.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

These eerie outliers of the lightning bug family glow a mysterious blue color.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Peek through a transparent pyramid and drink in the mountain made of books.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

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.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

This Elizabethan hedge maze is one of only six in North America.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

A Bibliophile's Dream.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

Mysterious 500-year-old tapestries depict a unicorn hunt.