Picture of a villa rooftop open-air garden

Quick answer：

A rooftop open-air garden on a villa typically features a spacious outdoor area with landscaping elements, such as plants, flowers, and possibly a seating area or garden furniture. This type of garden is designed to maximize the view and provide a tranquil space for relaxation and entertainment. It may also include features like a small pond, water features, or outdoor lighting to enhance the ambiance.