Skull Cave

Skull Cave - Credit: Wikimedia Commons

Skull Cave is a small and shallow cave on the central heights of Mackinac Island in Michigan, United States. The cave was carved during the Algonquin post-glacial period by the waters of Lake Algonquin, a swollen meltwater ancestor of today's Lake Huron."Mackinac Island State Park Interpretation", accessed April 14, 2008.Mackinac State Historic Parks website Read more on Wikipedia

type: NRHP
date from: None

Source: en.wikipedia.org