The Big Pointy Building is a base jumping point in San Fierro. It is located directly South of The Regular Players Club (the Downtown Hotel). The doorway in front open to all players goes directly up to a small platform. There is no longer a Parachute on top of the big Pointy Building and also once entered you cannot enter back through the door (you must Jump).
Its the 2nd biggest building with 295 metters after Tall Ass Building in Los Santos (330m)