Courtyards are outdoor spaces that are typically surrounded by walls or buildings. They can be used for a variety of purposes, such as providing a place to relax or entertain guests. Patios, which are six letters long, are one type of courtyard that is usually paved and often includes furniture and other amenities. Atria, which are five letters long, are another type of courtyard that is usually open to the sky and often includes a pool or fountain. Quads, which are also five letters long, are courtyards that are typically found on college campuses and are usually surrounded by academic buildings.