At the United Kingdom's only residential library you can sleep among the books.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

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

The beautiful baroque library of the Hapsburg empire.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Hidden above a drug store on a nondescript corner of Lincoln Heights is a private clubhouse for intrepid explorers.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

A lush green oasis in the middle of Chicago.

This conservatory allows a little bit of the tropics to thrive in the middle of a major Canadian city.

The romantic botanic tunnel feels like a well-kept secret.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

Ruins of a 10th century church tucked away deep in a botanical garden.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

One man and his wife have turned a barren Korean island into a fantastical botanical wonderland.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

A preserved oasis with traditional Andalusian-style architecture and beautiful views of the Nile.