Most states have a natural rock bridge and some have a number of famous ones and Wisconsin has its own natural bridge in the unglaciated Driftless Area weathered from sandstone deposited 1.6 billion years ago. The arch opening is 25 wide and 15 feet high.
The rock shelter on the right side, is 60 feet wide and 30 feet deep and when an archaeological excavation of the rock shelter was conducted in 1957, the oldest artifacts were dated between 9000 and 8000 BC, making the rock shelter one of the oldest-dated sites for human occupancy in northeastern North America. Evidence indicates that the shelter was used only periodically at first, perhaps as a hunting or seasonal camp for Paleo-Indians hunting Mastodons or Wooly Mammoths. Later the shelther was inhabited year-round.
Wisconsin’s Natural Bridge
