Ringwood Manor State Park offers many trails along the Ramapo Mountain range. These trails extend from the I-287 area near Wanaque/Oakland to the New York State Line. There are great opportunities here to see the entire New York City skyline. Most trails are accessible from Skyline Drive.
Shepherd Pond is a lake within the Ringwood Manor State Park area about a mile north of the Ringwood Manor. The pond is primarily used as a swimming hole during the summer months. I believe the state charges a $7 admission fee here from Memorial Day weekend to Labor Day weekend.
The grounds at Ringwood Manor include a couple of old mansions, a boutanical garden, a medium sized pond. A great place to go to get some flower pictures. The grounds are well kept.