We've been out using our Key to the City:
Trinity Church, the key opens the gate to the cemetery however when we arrived the gate was open with no way of closing it but the boys still loved unlocking the pad lock.
St. John Divine: The key opens the gate to The Baptistry
After St. John's we found this cute community playground
The playground was awesome, it was like having a big backyard with toy cars, tricycles, playhouses, etc the kids had a great time.