Since Wyoming’s iconic Devils Tower became the first U.S. National Monument in 1906, America is now populated with well over 100 of these unique cultural and geographic gems. In addition to volcanic landscapes like Malpais and Mount St. Helens and Utah’s oft-photographed Cedar Breaks there are numerous others that you might be less familiar with—and which absolutely merit a visit. From ancient petroglyphs to the geological wonders these are 16 under-the-radar national monuments to visit.
1. Cedar Breaks, Utah
Like a mini Bryce Canyon, minus the crowds, Cedar Breaks contains a stunning assortment of hoodoos and cliffs in southern Utah. Technically an amphitheater, the monument is three miles wide and 2,000 feet deep, filled with craggy rock formations jutting up from the base like natural skyscrapers. Considering the monument’s high elevation, it gets cold and snowy in the winter which lends vivid color contrast from the white powder atop the orange-hued hoodoos and lush green forests surrounding it. It’s a popular destination for snowmobilers as well who can ride along the rim and gaze out over the illustrious expanse.
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2. Petroglyph, New Mexico
Located on the western edge of Albuquerque lies one of the most concentrated collections of ancient petroglyphs on the continent. Native American tribes settled here hundreds of years ago and they left their mark in the form of symbols carved into volcanic rock across the desert terrain. With around 24,000 images and symbols, there’s plenty to see here. In addition to the petroglyphs, the monument contains hiking trails throughout its 17-mile park along with dormant volcanoes and canyons.
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3. Organ Pipe Cactus, Arizona
Some folks might be surprised to learn that Arizona has another national park unit dedicated to the preservation of a rare cactus. Saguaro National Park in Tucson is famed far and wide while Organ Pipe Cactus is more of an under-the-radar gem. Located along the Mexican border at the southern edge of the state, the monument is the only place in the U.S. where the organ pipe cactus grows wild. One glimpse at this sprawling, soaring species will clue you in to where the cactus gets its name. An ideal place for desert camping and hiking, the monument also has horseback trails, scenic drives, and biking opportunities.
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4. Natural Bridges, Utah
Since natural bridges are formed by running water, they are much rarer than arches which result from a variety of other erosion forces. Natural bridges tend to be found within canyons, sometimes quite hidden whereas arches are usually high and exposed as they are often the last remnants of rock cliffs and ridges. The amazing force of water has cut three spectacular natural bridges. These stunning rock bridges have Hopi Indian names: delicate Owachomo means rock mounds, massive Kachina means dancer while Sipapu, the second largest natural bridge in the state, means place of emergence. A nine-mile scenic drive overlooks the bridges, canyons, and a touch of history with ancient Puebloan ruins.
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6. Mount St. Helens National Monument, Washington
National park-like amenities like the Johnston Ridge Observator tell the story of America’s most infamous active volcano while guided cave walks are available in the monument’s expansive Ape Cave lava tube. Gorgeous wildflower-packed views of the volcano can be enjoyed in spots like Bear Meadows while those seeking a closer view of the crater rim may drive to the Windy Ridge viewpoint or even summit the rim of the 8,365-foot volcano with a permit.
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7. El Malpais National Monument, New Mexico
The richly diverse volcanic landscape of El Malpais offers solitude, recreation, and discovery. There’s something for everyone here. Explore cinder cones, lava tube caves, sandstone bluffs, and hiking trails. While some may see a desolate environment, people have been adapting to and living in this extraordinary terrain for generations. In the area known as Chain of Craters, 30 cinder cones can be found across the landscape. La Ventana Natural Arch is easily accessible. Trails lead up to the bottom of the free-standing arch for a closer look at this natural wonder.
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8. Canyon de Chelly National Monument, Arizona
A one-of-a-kind landscape and the cherished homeland of the Navajo people, Arizona’s Canyon de Chelly National Monument is a truly special place. Sheer cliffs rise on either side of this flat-bottomed, sandy ravine. Native Americans have worked and lived there for thousands of years and today Navajo people still call it home. South Rim Drive and North Rim Drive, each more than 30 miles long, are excellent driving routes along the canyons. The scenery is spectacular, including the White House Ruin cliff dwellings and the 800-foot sandstone spire known as Spider Rock.
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9. Grand Staircase-Escalante, Utah
Grand Staircase–Escalante National Monument is phenomenal whether you’re traveling along Scenic Byway 12 or on Highway 89. This area boasts a mixture of colorful sandstone cliffs soaring above narrow slot canyons, picturesque washes, and seemingly endless Slickrock. The monument is a geologic sampler with a huge variety of formations, features, and world-class paleontological sites. A geological formation spanning eons of time, the Grand Staircase-Escalante National Monument is a territory of multicolored cliffs, plateaus, mesas, buttes, pinnacles, and canyons. It is divided into three distinct sections: the Grand Staircase, the Kaiparowits Plateau, and the Canyons of the Escalante.
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10. Hovenweep, Utah and Colorado
Human habitation at Hovenweep dates to over 10,000 years ago when nomadic Paleoindians visited the Cajon Mesa to gather food and hunt game. These people used the area for centuries following the seasonal weather patterns. By about 900, people started to settle at Hovenweep year-round, planting and harvesting crops in the rich soil of the mesa top. The towers of Hovenweep were built from about 500 to 1300. Similarities in architecture, masonry, and pottery styles indicate that the inhabitants of Hovenweep were closely associated with groups living at Mesa Verde and other nearby sites.
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11. Montezuma Castle, Arizona
Montezuma Castle National Monument is dedicated to preserving Native American culture. This 20 room high-rise apartment nestled into a towering limestone cliff, tells a story of ingenuity, survival, and ultimately, prosperity in an unforgiving desert landscape. Although people were living in the area much earlier, the Sinagua began building permanent living structures—the dwellings you see at the monument—around 1050.
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12. Tuzigoot, Arizona
This village was built high on a limestone ridge over a hundred feet above the floodplains of the Verde River. It has clear lines of sight in every direction and can easily be seen from many of the other hills and pueblos in the area. Tuzigoot was a prime spot to build with excellent views, easy access to reliable, year-round water, and floodplains where cultivation of water-intensive crops like cotton was relatively easy.
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13. El Morro National Monument, New Mexico
Rising 200 feet above the valley floor, this massive sandstone bluff was a welcome landmark for weary travelers. A reliable year-round source of drinking water at its base made El Morro a popular campsite in this otherwise rather arid and desolate country. At the base of the bluff called Inscription Rock are seven centuries of inscriptions covering human interaction with this spot.
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14. Casa Grande Ruins National Monument, Arizona
Explore the mystery and complexity of an extended network of communities and irrigation canals. An Ancestral Sonoran Desert People’s farming community and Great House is preserved at Casa Grande Ruins. Archeologists have discovered evidence that the ancestral Sonoran Desert people who built the Casa Grande also developed wide-scale irrigation farming and extensive trade connections which lasted over a thousand years until about 1450.
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15. Chiricahua National Monument, Arizona
A Wonderland of Rocks is waiting for you to explore at Chiricahua National Monument. Rising sometimes hundreds of feet into the air, many of these pinnacles are balancing on a small base seemingly ready to topple over at any time. The 8-mile paved scenic drive and 17-miles of day-use hiking trails provide opportunities to discover the beauty, natural sounds, and inhabitants of this 12,025-acre site.
16. Aztec Ruins National Monument, New Mexico
Built and used over a 200-year period, Aztec Ruins is the largest Ancestral Pueblo community in the Animas River valley. Concentrated on and below a terrace overlooking the Animas River, the people at Aztec built several multi-story buildings called great houses and many smaller structures. Associated with each great house was a great kiva—a large circular chamber used for ceremonies. In addition, they modified the landscape with dozens of linear swales called roads, earthen berms, and platforms
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