Check out one of Pipestone's coolest wonders.
This unique geological formation is located approximately 18 miles east of Butte and north of I-90. The rocks in this unique geologic area chime when tapped lightly with a hammer. It is believed that the ringing is a combination of the composition of the rock and the way the joining patterns have developed as the rocks have eroded away, if a boulder is removed from the pile, it doesn't ring. Please don't disturb this natural phenomenon!