The radscorpion cave is a location in Fallout, only reachable by talking to Seth, from Shady Sands. Nine radscorpions are located here and need to be killed for the quest in Shady Sands in which you must kill radscorpions to protect the town from any more injuries. If the Vault Dweller has a high enough Perception, an explosive can be placed at a weak portion of the cave near the entrance to make it implode. This can be done whether the radscorpions in the cave have been killed or not, netting extra experience if you choose to do both.