Abstract: An above-ground outdoor circular swimming pool having the typical outer circumscribing support walls with a through-space as symbolic porthole-like window there is placed within space circumscribed by the outer circumscribing support walls, a water-retaining translucent or transparent liner mounted at and suspended circumscribingly from upper securing structure at the top of the circumscribing support walls. Thereby the secured and suspended transparent liner wall when containing water is pressed toward the porthole-like window, such that there is provided a line-of-sight view from each of the inside and the outside through the transparent liner. The liner itself if sufficiently rigid or sturdy in part or in whole, and/or alternatively a separate supporting transparent sheet-like transparent rigid and sturdy solid and/or mesh structure overlaps the through-space.