Black Chasm Cavern is a limestone cave system located in the foothills of the Sierra Nevada mountain range in California, United States. It is a popular tourist destination and is known for its stunning underground formations, including stalactites, stalagmites, and helictites.
Indian Grinding Rock State Historic Park is a California state park located in Pine Grove, Amador County, California. The park is dedicated to preserving and interpreting the rich Native American heritage of the area, particularly the Miwok people who inhabited the region for thousands of years.