Reservations are required to visit the Grotto, Cyprus Lake area and Halfway Log Dump. Find directions to the Grotto, a natural sea cave on Georgian Bay near Tobermory, is one of the most popular attractions in Bruce Peninsula National Park on the northern Bruce Peninsula. The Grotto and Halfway Log Dump are extremely popular tourist attraction during the summer so planning ahead is required. Learn how to get to the Grotto, make a parking reservation and about the permit parking to gain access to the Grotto and Halfway Log Dump in Bruce Peninsula National Park.