This is such a great park and a must see! Stop by the visitor's center to learn about the park's great civil war history. There are over 20 miles of hiking trails with varying degrees of difficulty. Also, paved trails surround the park where you can walk, run and event rent a bike. The park is about a 5-10 min drive from the wedding venue.
Marietta Square is the center of Marietta's historic downtown district. Lots of great dining options in addition to bars, etc. The square is about a 10-15 minute drive from the wedding venue.