Centrally located to 3 Dark Sky Preserve Parks, 7 lighthouses, more than 12 sinkholes, 300,000 acres of open water, 400+ million-year-old fossils, and more than 100 miles of groomed trails; the Sanctuary of the Great Lakes is your relaxed adventure oasis.You deserve to reconnect with what matters most in life; time spent with people you care about. Load up your kayak, telescope, fishing gear, snorkel mask, bird book, bikes, and hiking boots and point yourself toward Alpena.