Six hikers walking along cliff side with backpacksGreat Smoky Mountains National ParkTaken for use in Exhibit #3 of Sugarlands Visitor Center.Hikers on one of the Trails, IV-U-Hiking-5695, Miscellaneous - Use of Park - Hiking in Park
Hikers next to cliff on trail observing trees to rightGreat Smoky Mountains National ParkTaken for use in Exhibit #3 of Sugarlands Visitor Center. Vertical. Hikers on one of the Trails, IV-U-Hiking-5692, Miscellaneous - Use of Park - Hiking in Park
Gila Cliff Dwellings National Monument, New MexicoKings Mountain National Military ParkGCD1, Gila Cliff Dwellings Nat. Mon., Silver City, New Mexico, Prehistoric people built their homes in these six natural caves
Gila Cliff Dwellings National Monument, New MexicoKings Mountain National Military ParkGCD3, Gila Cliff Dwellings Nat. Mon., Silver City, New Mexico, Cave #2 has an interesting T-shaped door in its outer wall