What is Foamhenge and when can I visit? Posted byuser August 15, 2019 Leave a comment on What is Foamhenge and when can I visit? Foamhenge is our life-size replica of Stonehenge made entirely out of styrofoam. You can read more about Foamhenge and find information about visiting here. Please note that Foamhenge is located on private property and is only open to visitors during select times.