O'Bannon Woods State Park is a 2,000-acre (8 km2) state park in the state of Indiana, 32 miles (51 km) west of Louisville, KY.
O'Bannon Woods was originally known as the Wyandotte Woods State Recreation Area, which was part of the Harrison-Crawford State Forest. Its main attraction is Wyandotte Caves, which contains over fifty miles of underground caverns and one of the world's largest underground "mountains". The Blue River runs through the park. Indiana DNR lists it as one of their "Seven Hidden Jewels".
The park was named for former governor Frank O'Bannon and houses the O'Bannon Woods Interpretive Center, which offers exhibits and nature programs year round.
Duck pond by the Forest office, near the state park entrance.