This former mill tunnel was blasted under the ridge to divert a portion of the Muscatatuck River.

A historic hotel library in Indiana hides more than a few secrets on its shelves.

The world's largest anatomically accurate brain sculpture.

This museum collects over a century of automobile history including the iconic car from The Muppet Movie.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

This Moab institution functions as both a rock store and a small natural history museum.

The unusual patterns in this rock formation result from two distinct modes of weathering.

The location where the iconic movie character declared it was time to go home.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

This giant ice cream cone is the last remaining icon of a Salt Lake City staple.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.

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

The largest island on the great salt lake is home to curious creatures and strange stories.

Largest collection of mounted dinosaur specimens in the world.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

This geothermal hot spring hides beneath a slowly growing mineral dome.

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."

A house carved into a rock in the 1940s.

A beautiful 62-acre Catholic shrine and botanical garden.

A singular collection of hand-built art deco cars are held in a building with style to match.