9. Revolutionary Stone Ovens
It is likely that these stone structures were built as either oven or grills. They were used by girl scout campers as early as the 1950s. However, their original use still remains a mystery. It is possible they were built by either the Civilian Conservation Corps or the workers who built the George Washington Bridge. A third possibility raised on the tour was that they served an ancient religious purpose used to celebrate the solstice. Unfortunately, we were not able to test this hypothesis on the tour.
If you are feeling adventurous and would like to retrace part of the tour, David provided directions in an article he wrote for AM New York.