An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

This spire on an Austrian mountain is wrapped around a long spiral slide and has the world's tallest wooden observation deck.

The walls and streets of the ancient city are peppered with penises.

The location of the last witch trials of Italy, known as "The Salem of Europe."

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

A Bibliophile's Dream.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Every last book in this bookstore is signed by the author.

This rickety old shed hides a trove of secondhand literary treasures.

Explore more than 130,000 new and used books in the "world's largest outdoor bookstore."

Above an abandoned Underground station, this charming bookstore is home to strange antiquities and literary works.

A sprawling maze of used books piled from floor to ceiling.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

This small Catskills village has six independent bookstores and more bookshops than restaurants.

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

New York City's only radical feminist independent bookstore.

The oldest bookstore in Iceland.

An author's private collection of quirky travel-trinkets and oddities has become a rotating mini-museum in the window of a local bookstore.

Rare and classic books by Black authors are the focus at this independent bookstore in a historic Atlanta neighborhood.

A riverside tiny house with books and other treasures galore.

One woman’s obsession gave birth to this lovely oddity at the Boston Public Library.