- United States, Tennessee, Warren County, Cumberland Caverns1
- United States, Tennessee, White County1
- United States, Tennessee, Williamson County, Franklin1
- United States, Texas, Bexar County, San Antonio1
- United States, Texas, Tarrant County, Fort Worth1
- United States, Utah, Salt Lake County, Salt Lake City1
- United States, Virginia, Appomattox County, Appomattox1
- United States, Virginia, Bedford County1
- United States, Virginia, Highland County, Head Waters1
- United States, West Virginia, Kanawha County, Charleston1
- United States, West Virginia, McDowell County1
- United States, Wyoming1
- United States, Wyoming, Carbon County, Medicine Bow1
- United States, Wyoming, Carbon County, Shirley Basin1
- United States, Wyoming, Fremont County, Lost Cabin1
- United States, Wyoming, Fremont County, Riverton1
- United States, Wyoming, Natrona County, Casper1
- United States, Wyoming, Natrona County, Independence Rock1
- United States, Wyoming, Park County, Cody1
