By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

Imagine playing a version of Legends of the Hidden Temple, but with a distinctly Southern Gothic flare.

The curiosities and wonders of pharmacy in a delightful historic building.

Occult books, tarot, oddities.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.

Introducing the Green Fairy to her fawning masses.

A tower devoted to — and modeled after — the Divine Comedy.

One of Europe's oldest libraries.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

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

A vast collection of rare books, manuscripts & extraordinary objects illustrating the history of medicine.

"The prettiest love letters in the world" ... or so said Lord Byron.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

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

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

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

The oldest public library in Ireland.

A 200-year-old collection of oddities and medical paraphernalia.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Medieval torture techniques with a modern conscience.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

Secret refuge and museum of the Duke of Florence.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.