Bents Basin State Conservation Area
Bents Basin is a protected nature reserve and state park near Wallacia, New South Wales, Australia in the Sydney metropolitan area. The lake basin, which formed at the efflux of the Nepean River from the Hawkesbury Sandstone (Sydney sandstone) gorge, is a popular swimming hole with a camping area and an education centre used by local school groups.
Source: Wikipedia — Bents Basin State Conservation Area (CC BY-SA 4.0)