These disused steel furnaces are now haunting ruins that may one day be a national park.

A historic covered bridge is but one example of an oddly prevalent American urban legend.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

There aren't too many operational funiculars around, but Pittsburgh has two!

The first American department store, and home to the largest operating musical instrument in the world.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

World's first "penitentiary," meant to be humane, drove men insane.

Along the Outback Scenic Byway, adjacent to hot springs, this human-made geothermal feature takes unexplained breaks.

An old World War II hangar holds 20 vintage aircraft and the rare opportunity to take a ride in a 1940s warbird.

The wooden airship was the largest flying boat ever built.

Tens of thousands of tiny birds swarm into one school chimney every fall.

This nature center has one of the largest collections of native raptors in the Pacific Northwest.

A volcanic landmark located on an Ice age lake bed.

This little slice of the Netherlands in the Pacific Northwest blooms in a rainbow of color each spring.

This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

Two massive rock outcroppings on the Oregon coastline.

Massive crater in central Oregon.

Formerly secret, precariously perched boulders.

100-year-old shipwreck you can walk up to at low tide.