This elaborate towering structure was once famed for its revolutionary height.

A daily replay of the experiment that proved the rotation of the Earth.

Dr Barnes' $25 billion private collection of art and arboretum.

Yo, Adrian!

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

A park full of outsider art, created by college students studying outsider art.

Mysterious rocks that ring musically when struck.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

An ancient glacial pothole waterfall in the heart of the Green Mountains.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

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

This natural wonder is disappearing at an alarming rate.

Every fall this lake mysteriously drains, like a bathtub with the plug pulled out.

The only road through the heart of Glacier National Park.

Despite being dead since the 1970s, this Canadian tree is kept upright and intact by adoring locals.

A sleepy little town that had the greatest landslide in North American history fall on it.

Fossils, railroads, and waterfalls!

Decorated by local artists, the city's utility boxes have become three-dimensional canvases.

Eclectic musical collection ranging from hurdy gurdies and orphicas to the Rolling Stones Mobile Studio.

The New Central Library is a masterpiece of contemporary architecture in the midst of downtown Calgary.

With its webbed walls and bright red coloring, Calgary's iconic bridge looks like a finger trap puzzle stretched across the river.