Calamus Swamp is one of the rare kettle holes still remaining in Ohio. The kettle holes, Calamus Swamp included, are such a unique and intriguing environment to visit. They are also so beautiful throughout the seasons! Calamus Swamp offers a loop trail to enjoy the area. It is a combination of boardwalk, boards and chicken wire, dirt trail, and some creative use of logs to try to bridge muddy gaps. There's a great blind easily accessible via the grass to boardwalk trail, which lets you view the myriad of birds, insects, plants, and more that live in the area. We heard plenty of frogs plopping and singing as we walked by. A small parking area is available right off the road, with an informational kiosk of the swamp. read more