For perspective, that’s so ancient that when these rocks were forming, fish were still considered evolutionary overachievers.

Swim through Calaveras County's stunning Natural Bridges cave and uncover the ancient forces that shaped it, and the volunteers fighting to preserve it.

Native American legends surround Penn’s Cave, including the tragic tale of a young Seneca brave named Malachi and his forbidden love for a French trader’s daughter named Nita-nee (from whom Mount ...