Mansion example with boundaryless swimming pool

Quick answer：

A mansion with a boundaryless swimming pool typically refers to a luxury home that features a swimming pool designed without physical barriers, allowing users to swim freely without limits. This design often involves a pool that seamlessly blends with the surrounding landscape or a pool that extends into adjacent water bodies such as lakes or oceans. Boundaryless pools are popular in luxury homes due to their aesthetic appeal and the sense of freedom they provide.