A pond with a rock jetty extending into the middle where a raider sits with his armored dog. There is also a small raider base converted from some of the remains of the Skylanes Flight 1981 wreck nearby. Several non-aggressive mirelurks are swimming around in the water. Tarberries can be harvested around the perimeter, mostly around the northern end of the pond.
Dark Hollow Pond appears only in Fallout 4.
A naked, nameless, hostile NPC might spawn at the nearby pond house. When killed, his corpse cannot be looted or interacted with in any way. [verified]