Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

One of the first intercontinental ballistic missile sites in the United States.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

This erect, phallic geological spire wasn't always named so domestically.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

Inside this striking glass building, visitors can see thousands of dinosaur fossils in the positions that nature deposited them more than 150 million years ago.

The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

An enormous image of Utah's salt flats made entirely from tape.

Visitors to this library are in for a real-world education in modernist architecture.

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

This museum glorifies the humble potato.

Home to the deepest rift anywhere on Earth.

Where the famed daredevil attempted to launch himself across a canyon in a custom-built rocket.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

The largest outdoor art gallery in the Northwest United States.

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

A tunnel with windows, so you don't miss out on the impressive views.

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.

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