Hidden beneath Fayette County, Pennsylvania, Laurel Caverns—also known as Laurel Mountain Cave— stretches nearly three miles underground, making it the largest and deepest cave in the state. Open seasonally for guided tours and even spelunking, this massive natural formation is just as fascinating geologically as it is eerie. Laurel Cavern’s strange reputation goes back centuries. As early as the 1800s, stories circulated about a group of highway robbers rumored to have hidden stolen silver deep within the cave. Legend says their spirits still guard the treasure—perhaps explaining why no silver has ever been found… or why those who search are misled. There are also darker stories, and shadowy figures. Visitors report strange sounds echoing through the cavern. Whether those noises are paranormal or the result of unique acoustics and cave structure is up for debate. Would you visit a haunted cavern?