12 Lesser-Known U.S. National Monuments Worth Visiting

While many tourists head to major U.S. national parks such as Yellowstone or the Grand Canyon, the country is also home to over 100 national monuments. Many of these national monuments remain under-the-radar compared to the big hitters, but they’re just as significant and definitely worth the trip. If you’re looking to explore something off the beaten path, we look at 12 lesser-known U.S. national monuments:

Canyons of the Ancients National Monument, Colorado

Situated in the high desert of southwestern Colorado, Canyons of the Ancients National Monument is a treasure trove of ancient history. This large monument spans over 170,000 acres and contains the highest known density of archaeological sites in the United States, with more than 6,000 identified, including cliff dwellings, kivas, and petroglyphs left by the ancestral Puebloan people. When hiking through this rugged landscape, including  Lowry Pueblo and Sand Canyon, visitors can explore remnants of past civilizations in a tranquil, remote setting.

Devils Postpile National Monument, California

Located in the Sierra Nevada Mountains near Mammoth Lakes, Devils Postpile National Monument is known for its striking columnar basalt formations. These towering pillars, some reaching 60 feet high, were formed by volcanic activity thousands of years ago and are a rare geologic phenomenon. The nearby Rainbow Falls is also worth a visit and is a popular spot for photographers to capture unique images.

Chiricahua National Monument, Arizona

Dubbed a “Wonderland of Rocks”, Chiricahua National Monument in southeastern Arizona is an unexpected geological marvel. The monument is famous for its towering rock spires, pinnacles and balancing rocks, all sculpted by volcanic eruptions millions of years ago. With its unique formations, extensive hiking trails, including Echo Canyon Trail and Massai Point, and abundant wildlife, Chiricahua offers an immersive outdoor adventure in a remote and peaceful setting.

Bandelier National Monument, New Mexico

Tucked away in northern New Mexico, Bandelier National Monument preserves ancient cliff dwellings and petroglyphs created by the Ancestral Puebloans over 800 years ago. Visitors can hike through the scenic Frijoles Canyon, explore ancient homes carved into the soft volcanic rock, and even climb wooden ladders to access some of the dwellings. The blend of cultural history and dramatic natural landscapes makes Bandelier an unforgettable destination.

Agate Fossil Beds National Monument, Nebraska

Located in the Nebraska Panhandle, Agate Fossil Beds National Monument is a haven for paleontology enthusiasts. The site is home to some of the most significant fossil discoveries in North America, with remains of ancient mammals like the Menoceras (a small rhinoceros) and the Dinohyus (a giant pig-like animal) found here. Visitors can explore the fossil beds and learn about the area’s rich geological history at the visitor center, which also features Native American artifacts.

Craters of the Moon National Monument,  Idaho

True to its name, Craters of the Moon National Monument in Idaho offers a surreal, moon-like landscape formed by ancient lava flows. Spanning more than 750,000 acres, this vast volcanic area is dotted with craters, lava tubes, cinder cones and hardened lava rivers. Visitors can hike through the otherworldly terrain, explore lava caves and marvel at the stark beauty of this unique geological site. North Crater Flow Trail, Indian Tunnel and Inferno Cone are all must-see attractions. 

Organ Mountains-Desert Peaks National Monument, New Mexico

Rising dramatically from the desert floor near Las Cruces, New Mexico, the Organ Mountains-Desert Peaks National Monument is a rugged and scenic destination that offers a mix of natural beauty and history. The jagged peaks of the Organ Mountains provide a striking backdrop to the region, which is rich in Native American, Spanish and Wild West history. Visitors can explore petroglyph sites, historic trails and take in breathtaking views from the many hiking paths including the Dripping Springs Natural Area and Aden Lava Flow Wilderness.

Jewel Cave National Monument, South Dakota

Hidden beneath the Black Hills of South Dakota lies Jewel Cave, the third-longest cave in the world, with more than 200 miles of mapped passageways. Known for its dazzling calcite crystals that sparkle like jewels, this underground labyrinth offers guided tours that take visitors deep into the cave’s intricate formations. Above ground, the monument offers hiking trails through ponderosa pine forests where visitors can take the Scenic Tour and the Hell Canyon Trail.

Castle Mountains National Monument, California

Situated on the California-Nevada border, Castle Mountains National Monument is a hidden gem in the Mojave Desert. This remote monument offers striking desert landscapes, with rugged mountain ranges, Joshua tree forests and wonderful wildflower blooms in the spring. It’s a prime destination for solitude, stargazing and exploring the remnants of mining history, all against the backdrop of the Mojave’s natural beauty.

Hovenweep National Monument, Utah and Colorado

Straddling the Utah-Colorado border, Hovenweep National Monument protects six groups of Ancestral Puebloan ruins that date back to the 12th century. The most remarkable features of Hovenweep are its well-preserved stone towers, including the Tower Group and the Cajon Square Group. Visitors can explore these ancient dwellings and marvel at the architectural ingenuity of the people who built them.

El Morro National Monument, New Mexico

El Morro National Monument in western New Mexico is a fascinating blend of natural beauty and cultural history. For centuries, this large sandstone bluff served as a watering hole for travelers, from Native Americans to Spanish explorers and U.S. settlers. Over 2,000 inscriptions, petroglyphs and carvings adorn the cliffs, telling the stories of those who passed through. A hike to the top of the bluff offers stunning views of the surrounding landscape, along with the ruins of the ancient Atsinna pueblo.

Tuzigoot National Monument, Arizona

Located in the Verde Valley of central Arizona, Tuzigoot National Monument is the site of a well-preserved Sinagua pueblo, a civilization that thrived between 1000 and 1400 AD. This multi-story dwelling was built atop a hill, offering panoramic views of the valley below. Visitors can explore the ruins, learn about the Sinagua people at the visitor center and enjoy the tranquility of this lesser-known archaeological site.