 It was discovered in modern times by gold miners in 1851, but it has long been known as an interesting geological feature by prehistoric peoples.It gets its name from the moaning sound that echoed out of the cave luring people to the entrance, however expansion of the opening to allow access for the public disrupted the sounds.The portion of the cave developed for tourists consists of a spacious vertical shaft 165 feet tall, which is descended by a combination of stairs and a unique spiral staircase built in the early 1900s.