The GTA SA Mods category contains a wide variety of mods for GTA San Andreas: from script mods and new buildings to new sounds and many other types of modifications. There are almost no limits and this way you can completely change the environment in Los Santos. Besides funny modifications there are also some that will turn you into superheroes (e.g. Hulk, Iron Man etc.) and bring along completely new abilities. The possibilities and choices are huge!
Installing mods for GTA San Andreas is usually easy and is described in the mods' readme files.