This refers to the actual view of a rooftop swimming pool without any boundaries, which could be a unique architectural feature or a design element. Rooftop pools are popular for their scenic views and the feeling of openness they provide. They often require careful structural engineering to ensure safety and stability, as well as considerations for waterproofing and maintenance. The concept of a 'boundaryless' rooftop pool suggests a design that maximizes the pool's visual impact by eliminating physical barriers or creating an illusion of limitless space.