A field of nothing but boulders which resembles a giant's gravel driveway.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

One of California's oldest continually used high schools has an interesting history, both on and off screen.

The ghostly remains of an accidental sea.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Hike amid the palm trees that thrive among Southern California's Indio Hills.

A 250 million-year-old rock formation has earned a rather unique nickname.

An Irish Memorial commemorating those who perished due to potato blight.

Yo, Adrian!

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

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

A layered tribute to the work of mosaicist Isaiah Zagar.

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

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

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

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

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

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

What began as an art installation is now the private drinkhaüs for a brewery's employees.