Entered at the Pennybrook Road entrance (ample parking) and explored the Undercliff Path, Dungeon Road, Cooke Road, Cornell Path, and Jackson Path. Easy hiking, although watch your footing on some of the rockier trails! Dungeon Rock is very interesting. There is a metal door in the crevice of the rock. The metal stairs inside lead down to a winding tunnel carved out in the 1600s and 1800s (look up the strange history of this place). If you’re going to go down into the tunnel, wear good footwear (slippery) and take a headlamp (dark). Steel Tower is cool too with great views of the surrounding area (including the Boston skyline).