A stairwell is a vertical space in a building that contains a set of stairs, allowing people to move between different floors. It is typically enclosed by walls and may have a railing for safety. Stairwells can be found in various structures, including homes, offices, and public buildings, and they often serve as emergency exits. In addition to providing access, stairwells can also be designed for ventilation and natural light. Many buildings incorporate windows or skylights in their stairwells, enhancing the overall aesthetic. Stairwells are essential for building safety, especially during emergencies when elevators may not be usable.