11 Most Mysterious Places in the U.S.

2) Horseshoe Canyon, Canyonlands National Park

Located in Utah, it’s home to some of the most mysterious and noteworthy rock art in North America. These pictographs date back 2,000 to 8,000 years. Nomadic hunter-gathers are thought to have used this canyon as their home, although little is known about who made these amazing paintings. The Great Gallery houses the best of the best, boasting a 200-foot long, 15-foot tall, panel of odd-but-familiar shaped humanlike depictions. The alien resemblance these pictures bear is especially eerie. Details like big eyes, antennas, and no arms and legs sparked the alternate theory that extraterrestrial beings created these paintings. Accessing Horseshoe Canyon is no walk in the park. A bumpy, 40-mile dirt road, deposits visitors at the trail head. From here, you’ll descend 750-feet down to the canyon bottom, followed by a 3-mile hike to the Great Gallery. Bonus: You’ll view some other significant rock art along the way.