Open-air refers to spaces that are outdoors and not enclosed by walls or a roof. These areas can include parks, gardens, and public squares, allowing people to enjoy nature and fresh air. Open-air settings are often used for various activities, such as concerts, markets, and festivals, providing a vibrant atmosphere for social gatherings. Open-air markets, for example, are popular in many cities, where vendors sell fresh produce, handmade goods, and local crafts. These markets promote community interaction and support local economies. Additionally, open-air museums showcase art and history in natural settings, enhancing the visitor experience through the surrounding environment.