Once a small port and boat launch, Callville Bay is a derelict no-man's land overrun by cazadores from their nest inside the corrugated warehouse that has fallen in on itself. There's a (currently inactive) harpoon winch on the launch itself.
Callville Bay is a boating harbor serving Lake Mead. It consists of a ruined boat house and a store named Captain Dean Boat Rentals. The store contains a few bottle caps, a locked safe and a first aid box guarded by giant rats. In the boat house one will find miscellaneous supplies guarded by a group of cazadores, which have established a nest there. The slipway jutting out into Lake Mead is where Loyal's detonator is used to activate the deployable ballast as part of the quest Volare!.
- In Captain Dean Boat Rentals, on the shelf directly in front upon entering is a toy car that merely says "Take". However, you cannot take it, and picking it up causes a message to say "Good! Now push (grab button) again to let go of the skull."
- The warning on the towing winch is written in French. It translates as "Danger of death: High-tension cables. Distance: 0 m. 00. Depth: 0' 60".
- The welcoming sign includes an advertisement for the Poseidon Energy U-235 outboard motor.
Callville Bay appears only in Fallout: New Vegas.