An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

Steepest flood safety railway in the entire world.

One man's real life disfigurement inspired a lasting local legend surrounding an eerie tunnel.

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

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

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

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

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

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

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

At the time of its completion, it was the tallest dam in the world.

The first declared National Monument in the United States.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Within the former ghost town of Cisco is a carefully restored tiny town with one resident and its own art residency.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.