From Yellowstone’s famed geysers to the towering Tetons, Wyoming is home to some spectacular natural wonders, many of which have left tourists—and even some scientists—scratching their heads in disbelief.
1. Heart Mountain
Located just outside of Cody, Heart Mountain was once part of the Absaroka Mountain Range. Whether the 8,123-foot peak had a tiff with its rocky neighbors or just wanted a change of scenery, the mountain moved about 25 miles away—all on its own. While some insist it’s the work of aliens and giants, scientists offer a different, but hardly less stunning, explanation:
Fifty million years ago, a series of volcanic eruptions in the Absaroka Range rocked the area. Water-filled ditches within the Heart Mountain became packed with lava, which heated the water and surrounding rock. With nowhere for the lava and hot water to escape, the mountain became a giant pressure cooker, eventually lifting the rock and causing the mountain to slide. While some scientists predict that the slide took place over thousands of years, others suggest that the journey lasted fewer than 30 minutes, meaning the huge mass of rock traveled at an average speed of more than 100 miles per hour.
2. Killpecker Sand Dunes
Positioned just a few miles north of Rocks Springs in the Red Desert, Killpecker Sand Dunes are one of only seven “booming” or singing sand dunes in the world, so visitors can expect to hear distinctive roaring or whistling sounds at the landmark.
How do singing sand dunes work? Killpecker’s sand grains are rounder and more polished than the grains of non-booming dunes. Subsequently, as wind passes over the dunes or visitors walk on the grains, the smooth sand slips and slides down the sides of the hills, producing the inimitable sounds.
3. Boar’s Tusk
Boar’s Tusk, the core of an extinct and eroded volcano, protrudes out of Killpecker Sand Dunes’ otherwise flat landscape. The volcanic plug is one of two geologically formed landmarks in Wyoming; the other is Devils Tower in the northeastern corner of the state (see the next landmark on our list)
The spire that makes up Boar’s Tusk’s summit is also known as the Sentinel or Rock Point. Four-wheel-drive vehicles are recommended for exploring Boar’s Tusk and the surrounding Red Desert outside of Rock Springs.
4. Devils Tower National Monument
Erosion is credited for revealing Devils Tower, a massive, once-hidden monolith that towers 1,267 feet above the Belle Fourche River near Sundance. The park surrounding the national monument, home to deer, prairie dogs and other wildlife, is blanketed with pine forests, woodlands and grasslands.
Also known as Bear Lodge, the monolith is a sacred place for many American Indian tribes in the area, including the Arapaho, Crow, Cheyenne, Kiowa, Lakota and Shoshone, and was designated as the nation’s first national monument in 1906 by President Theodore Roosevelt. Learn more about geologic landmarks in Wyoming
5. Sinks Canyon
Sinks Canyon State Park, located just outside of Lander, is home to a disappearing river. The middle fork of the Popo Agie River (pronounced po-po-zsha) rushes out of the Wind River Mountains and flows until it suddenly curves into a large cave and descends underground, an area aptly dubbed “the Sinks.” Then, the river wondrously re-emerges about a quarter mile away in a large, calm pool called “the Rise.”
Until scientific tests using colored dye confirmed that the two are connected, no one knew that the water at the Rise was the same water that disappeared into the Sink. Tests also revealed that more water emerges at the Rise than is originally found at the Sink, which remains an unexplained phenomenon.