Arch Rock - Credit: Wikimedia Commons
Arch Rock - Credit: Wikimedia Commons
Arch Rock is a geologic formation on Mackinac Island in Michigan. It is a natural limestone arch formed during the Nipissing post-glacial period, a period of high Lake Huron levels following the end of the Wisconsin glaciation. To this day Arch Rock stands on the Lake Huron shoreline above the water. Read more on Wikipedia
Source: en.wikipedia.org