Shell buildings is the name given for buildings which have a large exterior, but with a smaller playable interior. Examples of these buildings include the pyramids and the dragon cave exterior in The Sims 3: World Adventures. The penthouses of The Sims 3: Late Night are also shell buildings. The Sims 3: Showtime adds shell buildings. In The Sims 3: University Life, university buildings are also shells. In The Sims 3: Into the Future, many community lots are covered in futuristic shells. In The Sims 3: World Adventures, the rooms in the tombs are pitch black if not explored. The Sims 4: City Living added apartment shells that are similar to The Sims 3: Late Night's penthouse shells.