Natural Wonders and State Parks Start Your Adventure Here... Baxter State Park Gulf Hagas Moosehead Lake Mount Katahdin Penobscot River State Parks in The Maine Highlands Waterfalls The Maine Highlands region has one of the most diverse landscaped areas in the entire state.  We are home to Maine’s tallest mountain, longest river, largest lake and the jewel of Maine’s conservation efforts, Baxter State Park. A truly wonderful feature about The Maine Highlands region is how natural it has stayed. With a diverse selection of parks featuring a great variety of scenery and wildlife, The Maine Highlands has what you need to start your outdoor experience.