Hoodoos, Taffoni, and other Erosional Features visited in the U.S. and Canada
| Bisti/De-Na-Zin Wilderness | Utah |
| Bryce Canyon National Park | Utah |
| Capitol Reef National Park | Utah |
| Canyonlands National Park (Needles) | Utah |
| Chaco Culture National Historic Park | New Mexico |
| City of Rocks National Reserve | Idaho |
| Goblin Valley State Park | Utah |
| Guadalupe Mountains National Park | Texas |
| Hells Half Acre, HWY 26 | Wyoming |
| Mexican Hat Rock | Utah |
| Red River Gorge National Geological Area, KY | Kentucky |
| Theodore Roosevelt National Park | North Dakota | Valley of Fire State Park | Nevada |