Removed Features

Brown Brick Vertical Face
In the original RollerCoaster Tycoon when choosing a ride/attraction in the shop category, the Drink Stall's preview image contains an unused vertical face that has brown bricks and shares the same underground tunnel as the standard rock edge. This could possibly be because the ride/attraction icons were created before the final version. Either this was the original rock edge or the brown brick edge was simply was cut from the final release.

Original Martian Building
On Chris Sawyer's website this building for [Martian Theming]] originally included supports underneath it, but these supports don't appear in the final game.

Ruined Church
Also found on Chris Sawyer's website this building was proabably meant to be found in the spooky themeing, but this objects was never found in game.