DGT Fort Du Pont State Park
Located near the Boat launch area of Fort Dupont State park. After finding the cache you can drive around the old buildings and also visit the Fort Delaware Historical Society Building and Museum. From March 1 to November 30 day use park entrance fees are charged ($3 for Delaware car, $6 for out of state) The fee is good for all state parks that may be visited that day--save your receipt.
DGT Fort Du Pont State Park (Coordinates) - N 39° 34.524 W 075° 35.162