Hidden at the former estate of William Rockefeller on the Hudson River known as Rockwood Hall, there is a grotto. As part of Rockefeller State Park, the property is a very popular walking destination, but the grotto itself is far less known. The Rockefeller Foundation contacted the Rovers, concerned that the grotto was in a state of disrepair, hoping to restore the site and encourage more access. In 2023, the Rovers replaced 36 steps and brought life back to the site.