Walk 2,300 feet above the ground on the "Troll's Tongue."

Renaissance villa and gardens complete with a tormented colossus.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

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

An ethereal glowing blue ocean cave in Croatia.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

Tubing through a cave lit with glowworms is a magical underground experience.

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

A monument to the art of slicing people open.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A prohibition-style speakeasy takes up residence in the last Victorian residence in Hollywood.

A seemingly endless landscape of pure salt stretches far across Bolivia.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

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

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

A heavenly experience, right here on Terra Firma.

This lab's maddening silence is good for business but bad for sanity.

An alchemist's "magic door" stands in the middle of a Roman park.

A beautiful geyser under environmental threat.

Every autumn, this hillside is ablaze with red summer cypress.

Stunning wetlands ablaze with pink lotus flowers.