The first expansion too the amusement park management game Rollercoaster Tycoon was Corkscrew Follies (known as Added Attractions in the UK), which added additional scenarios, rides, facilities and also new scenery with additional themes. One of the most important additions of this expansion pack is a banner sign, which can be set to display a "Do Not Enter" message to guests - a rule that they will always adhere to. This allows the player to designate certain paths as being only for staff, or control guest movement on busy paths using a one-way system.
Source: Wikipedia, RollerCoaster Tycoon#Expansion packs and sequels , available under the CC-BY-SA License.
Among the new attractions were the steel twister roller coaster, heartline roller coaster, roto-drop, ghost train, and the chute-to-chute. Along with these new rides comes new scenery themes as mentioned before. These new themes include spooky, jurassic, and jungle.