Beta Places are locations within the gameworld that were removed from the final version of the game. Some of these places were either removed, renamed, changed or deleted during development of the game.
Unknown Portland Island prison
It is believed that once in the development stages of the game, there was a prison to the north-east of 8-Ball's bomb shop on Portland Island on an extended area of land. This is supported by the fact that Claude, the game's protagonist, was being transported there in a prison convoy in the opening cutscene.
The general layout of Chinatown was different in the beta.
In the early maps of Liberty City, there was a docked ship (likely a cargo ship) at Staunton Island.
There were many roads on Portland, Staunton Island and Shoreside Vale that were removed from the final version.
The pier at the south-west corner of Staunton Island did not exist. Instead, it was land. There were also five unknown boats near the missing pier that do not appear in the final version.
The Upstate did not exist in the Beta. If it did, however, it would be shorter because the airport was at one point on Staunton Island.
In the beta, the Staunton side of the lift bridge extended straight out, instead of its current spiral design.
The Cochrane Dam was smaller.
Fort Baxter Air Base had a long runway and two control towers. One of them was partly left in the game and can be seen when approaching the location from a distance, as the player is seeing its low-resolution model.
The stadium originally didn't exist.
The area of Vice Port was different and had a waterway.
The first and third runway were longer.
A small island, which is believed to be based on Alcatraz prison, was cut. It was located in the center of San Fierro Bay. This island can still be seen on the in-game beta maps which can be found hanging inside Mike Toreno's Ranch and the Lil' Probe Inn.
The runway of the airport was shorter in the beta.
The village of Dillimore was smaller.
The Hunter Quarry was smaller.
Unknown Land Strip
In the northwestern part of Alderney, there was a long strip of land that was cut in the final. It is unknown what would have been there.
In the southwestern area of Alderney State, there was what appeared to be another airport that was cut.
The runway was shaped more like a trapezoid in the beta, rather than the triangle that is in the final game. It was most likely designed for flyable planes, which were also cut.
Middle Park was significantly larger, the lake was shaped differently, and there was no water in the northern half.
The Grand Senora Desert was going to be much bigger in the beta, it would have more stretch of open roads, more buildings and more highway routes.
The North Point didn't exist in the beta game.