The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

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

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

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

Beside a busy highway, a colony of Great Blue Herons raises hundreds of offspring each year.

A taste of Middle Earth, in the middle of the Bayou City.

A tunnel of hardened lava along Maui’s famous Road to Hana.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

A bit of retro transportation flair preserved in the world's largest department store.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

A giant ball made from pieces of an old Jeep.

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

A 30-foot stack of piano keys memorializes one of the greatest keys players in jazz history.

Faces carved into the cliffs create an otherworldly walking trail.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

One of 100 “Whaling Wall" murals painted in 13 different countries by a renowned marine life artist.

One of the few brewers in the U.S. experimenting with hop-free beers.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

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