The main feature of Gahanna Woods State Nature Preserve, 59 acres, is a swamp forest with excellent spring wildflowers.

Gahanna Woods encompasses a variety of wooded and successional habitats in an urban setting. This preserve protects perhaps the best remaining complex of buttonbush swamps and vernal pools in central Ohio. A pin oak-silver maple swamp forest surrounds these woodland pools.

Mature oak-hickory and beech-maple communities occur on the higher and drier areas of the preserve. Numerous spring wildflowers can be found in these woods. Of significance are the yellow water-crowfoot, swamp saxifrage, wild hyacinth, skunk cabbage and several species of trillium. The only known population of cypress-knee sedge in Ohio occurs in one of the buttonbush swamps within Gahanna Woods.

Located in Franklin County 1.5 miles east of Gahanna on Havens Corners Road, then .5 mile south on Taylor Station Road to the parking area. Loop trails are present.