The Kettle Lake Bog Garden offers a rare opportunity to experience one of Ohio's most extraordinary ecosystems at eye level. Formed when the last glaciers retreated more than 12,000 years ago, kettle bogs are living remnants of a colder world—quiet landscapes where sphagnum moss slowly builds peat, water turns naturally acidic, and plants found hundreds of miles farther north still survive today. In Ohio, these habitats are exceptionally rare, with only a handful of intact kettle bogs remaining.