Bits of architecture from a town destroyed in World War I now decorate this hotel garden.

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

One of Belgium's oldest hospitals saw patients from the 13th to 20th centuries before becoming a museum.

London's old-school healing garden.

Oxford University's stateliest library seems designed to make students truly feel the weight of knowledge.

One of Europe's oldest libraries.

Rare collection of medieval books under lock and key.

The second largest surviving chained library is housed in this 12th century church.

This gorgeous space is England's largest independent library outside of London.

This Scottish manor house is a lush relic from the life of a literary great.

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

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

The sign at the garden gate reads: "These Plants Can Kill."

An engineering wonder at Pillnitz Castle protects a precious 230-year-old flowering shrub.

The oldest botanical garden in the world that technically isn't the oldest.

This Quebec estate is home to the elaborate gardens of a self-taught horticulturist.

The plants form a living library and laboratory for researchers and students at Michigan State University.

A unique botanical garden housed in three giant geodesic domes.

A beautiful 62-acre Catholic shrine and botanical garden.

Upside-down trees serve as natural flower pots in this hanging garden of Alaska.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

Admire endangered plants in a verdant garden that looks straight out of a Monet painting.

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