Back o Beyond

Back O'Beyond, showing the lake and trees

Back o Beyond is an area located in Flint County, San Andreas, from the game of the same name. To the west of the area is Shady Creeks and the rest of Whetstone, while to the east is the Los Santos Inlet. To the north, meanwhile, are Leafy Hollow and Flint Range. It has achieved notoriety from the large number of myths which seem to focus on the area. The most notable myth is Bigfoot.

Weapons

An angled tree which allows the player to run up it and jump into the lake below (shown in the above screenshot).
The water here is unique in that it is evidently stagnant, being brown as opposed to blue. It is prevented from reaching the sea by a natural dam of rocks. A glitch is present here, if a vehicle is slightly submerged, the underwater part will be invisible when viewed from the surface.
Often, empty cars will spawn at the top of a nearby hill, rolling down and giving the appearance of ghost cars.