This past Wednesday, Harvey and I hiked to Gypsum Cave. Located in Sunrise Mountain, less than 20 miles northeast of Las Vegas, Gypsum Cave is a six-room limestone cave that is considered to be among the oldest aboriginal sites in North America. The cave measures 300 feet long (deep) by 120 feet wide. Its rooms are filled with dry, dusty deposits. Gypsum Cave is significant because it has yielded artifacts related to early human occupation and information about the region's ancient ecosystem. Click here to read more about this site ... Gypsum Cave.