The remains of a Canadian train crash are now mouldering beneath layers of rust and graffiti.

Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

This Elizabethan hedge maze is one of only six in North America.

This expansive bridge in the Canadian wilderness was originally just built for friends.

A giant 400-acre preserve in North Florida for displaced wolves.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

These aggressively sustainable art homes look like something out of 1970's science fiction.

San Francisco Bay's ghost town.

The highest bridge in America was built for an almost unnervingly small amount of money.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

A giant milk bottle from the 1930s beckons drivers to this diner.

The longest and widest floating bridge in the world.

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

An electrifying collection of gadgets and literature from the 16th through 20th centuries.

This playground sculpture of an icon from the past is dedicated to the children of the future.

This Cold War missile launch site has been abandoned for 40 years.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

Activists are fighting to preserve these unfinished highway ramps as a tribute to the citizen revolt that halted their construction decades ago.

This Seattle store is packed with all sorts of curious creatures and creations.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

An enclosed rotunda at the Henry Art Gallery in which viewers can look up and see the uninterrupted sky.

Tour the original street level of Port Angeles, buried underground in 1914.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.