Flooded sinkhole

 is a location in Point Lookout.

About
The Flooded Sinkhole is a lake that separates the Trapper's Shack from the Grower's Shack. When you swim down to the bottom, tons of miscellaneous items float to the top. At the the bottom are three safes, a First Aid Kit and some barrels. Two Nuka-Cola Quantums can be found floating in the water here.

It may also be believed that the sinkhole was formed by the collapse of a mass burial site that after many years hollowed out from all of the corpses decaying.

Appearances
appears only in the Fallout 3 add-on Point Lookout.