Picture of an outdoor sky pool

Quick answer：

An outdoor sky pool, also known as an rooftop pool or sky-high pool, is a swimming pool located on the roof of a building. It provides a unique experience, allowing users to swim with panoramic views of the surrounding landscape. These pools are often found in hotels, resorts, or luxury residential complexes. They come with challenges such as structural engineering requirements and safety concerns, but they can offer stunning architectural features and a luxurious leisure experience.