This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

This simple badlands butte is the highest point in North Dakota and may be the only high point to charge admission.

They call this long foot bridge a swinging bridge, but really it's the bouncing you have to watch out for.

This former sugarcane transport tunnel is now a portal to a lovely beach.

The highest peak in Puerto Rico is home to a rare fern that can only be found on six trees at its summit.

One street divides a single town that stands in two U.S. states.

Two nations form a rare four-sided border at the peak of a mountain, philosophical questions result.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

A monument marks the beginning of the longest north-south road in the United States.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

The world's longest covered bridge is a quaint and incredible wooden tunnel.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

Over 50 whirling pools left behind from the glacial age.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Locals say Williams's ghost still haunts the place where she was murdered.

A century after his death, this covered bridge still calls to mind the plein air painter who loved it.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

This painted Lego bridge is the product of over a century of locomotive history.

Abandoned since the 1950s, the streetcar lane beneath the heavily trafficked bridge lays empty and unused.

The world's only and thus largest collection of its kind celebrates everyday wonder through simple umbrella sheaths.

Explore the dark underground corridors of this graffiti-covered former military fortification.

The world's largest rotating world.

This 150 foot seven-tiered cascading waterfall is one of the hidden gems of the White Mountains.