1- Hamilton Pool Preserve, Texas
|A waterfall flows freely into Hamilton Pool, which is surrounded by a collapsed grotto|
The natural pool and creek are not chemically treated, so water quality is monitored regularly and swimming is occasionally restricted. Hamilton Pool is part of the Balcones Canyonlands Preserve and is a protected environment.
2- Carlsbad Caverns National Park, New Mexico
|The forces of water decorated the cave in an almost endless array of spectacular limestone formations such as this column and array of stalactites|
The park entrance is located on US Highway 62/180, approximately 18 miles (29 km) southwest of Carlsbad, New Mexico. Carlsbad Caverns National Park participates in the Junior Ranger Program. The park has two entries on the National Register of Historic Places: The Caverns Historic District and the Rattlesnake Springs Historic District. Approximately two thirds of the park has been set aside as a wilderness area, helping to ensure no future changes will be made to the habitat.
Carlsbad Cavern includes a large cave chamber, the Big Room, a natural limestone chamber that is almost 4,000 feet (1,220 m) long, 625 feet (191 m) wide, and 255 feet (78 m) high at the highest point. It is the fifth largest chamber in North America and the twenty-eighth largest in the world.
3- The Wave, Arizona
|The Wave, a sandstone formation in northern Arizona|
The formation is well–known among hikers and photographers for its colorful, undulating forms and the difficult hike required to reach it. Due to the fragile nature of the formation and the large number of people wishing to visit it, a daily lottery system is used to dispense only ten next–day permits in person at the Kanab visitor center. Additionally, ten online permits for each date are available four months in advance of a planned trip. A map and information about the hike is supplied to those who have obtained permits.
It is accessible via hiking a 1.5-mile (2.4 km) round trip from U.S. Route 89, but an access road also reaches the geological structure, as it is part of a state park. Horseshoe Bend can be viewed from the steep cliff above.
5- Bryce Canyon National Park, Utah
6- Na Pali Coast State Park, Hawaii
The Nā Pali Coast State Park is a 6,175 acres (2,499 ha) Hawaiian state park located in the center of the rugged 16 miles (26 km) along the northwest side of Kauaʻi, the oldest inhabited Hawaiian island. The Nā Pali coast itself extends southwest starting at Keʻe Beach extending all the way to Polihale State Park. The na pali (high cliffs) along the shoreline rise as much as 4,000 feet (1,200 m) above the Pacific Ocean. The state park was formed to protect the Kalalau Valley.