A Bibliophile's Dream.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This shop for all your super spy needs hides an educational secret.

A lush green oasis in the middle of Chicago.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

On the Oregon coast there is a natural hole that seems to be draining the sea.

A cheeky name for an observatory visitor's center.

This is one of the last remaining theatres in Canada to feature an Art Moderne architectural style.

An automotive, farming machinery, and aviation museum located in Wetaskiwin, Alberta, Canada.

A seven-story wooden coal tipple stands this former mine, the last of many that once covered this area.

With a floor made of thick glass, this observation deck offers a full view of Sunwapta Valley's mountains and rivers.

A surviving remnant of the thick ice mass that once mantled most of Western Canada's mountains.

Watch maple syrup being made without ever leaving the city.

These prehistoric replicas were based on actual skeletal remains.

This painted blacktop brings the classic arcade game to life.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

Inside this museum, the history of the Walt Disney Family empire is on full display.

With the touch of a button, you can read a randomly selected short story.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.