Rome's semi-secret peephole vista is also a former Crusader stronghold.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

Surreal riveted sea forts once protected the Kent shores from German attack.

An enormous, inside-out glass globe built in 1935.

A spectacular rainbow of stained glass makes the "Pink Mosque" one of the most beautiful in Iran.

A restored historic movie theater is the perfect place for a regional film archive.

This fairytale-like structure is the last turf church ever constructed in Iceland.

Monasteries on rock pillars, once accessible only by frayed ropes.

An alternate history park where the Union Army loses the war... to dinosaurs.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

The only surviving prototype for Buckminster Fuller's house of the future.

A unique collection of Science Fiction, Fantasy, and everything in-between.

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

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

Detroit housing collective working to create an "environment for revolutionary change."

Standing guard on top of an old, vacant ice cream shop.

Chicago's North Park Village was once the largest municipal sanatorium in the country.

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

The world's only known button museum.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

A lush green oasis in the middle of Chicago.

A science teacher's dream.