Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

This small memorial is dedicated to the Perryville State Prison firefighters who perished fighting the Dude Fire in 1990.

A planet-hunting astrograph built in the 1920s to seek out the so-called "Planet X" beyond Uranus.

This church on a Tohono O'Odham reservation has stood since 1797.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

Petroglyphs, bird watching, and a 100-year-old Ranch in one location.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

Legend says train robbers stashed their gold within the depths of this unusual cave.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

These free-roaming horses were once destined to disappear from the land.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

A spiritual vortex among the red rocks in Sedona.

These 100-year-old tunnels in downtown Provo house artists, restaurants, and a few surprises.

In 1952, this restaurant began selling the Colonel's “secret” recipe.

Walk through the sets of old western films at this small museum in Utah.

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

Oddly shaped rock formation, misassociated with a nearby utopian community.

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

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

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

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.

This museum glorifies the humble potato.