Great Basin National Park
Located in remote Nevada, Great Basin National Park is home to the Lehman Caves and the Bristlecone Pine groves. Bristlecones are suggested to be the oldest known living tree.
The Citadel
The Citadel is an Ancestral Puebloan dwelling within Bear Ears National Monument, in southern Utah. This ancient fortress lies at the end of an awe-inspiring sandstone peninsula.