What this trend looks like
A nature-integrated playground treats the site itself as part of the play sequence rather than a backdrop for it. Slopes become slides or climbing paths, boulders are worked into climbing sequences, logs form balance or seating elements, and planting is built directly into the layout so children move through vegetation and terrain rather than around a fenced playground set on flat ground. Done well, this approach makes the playground feel like an extension of the site itself, which is particularly valuable at resorts, campsites and destination properties where the surrounding landscape is already part of the guest experience.
Feasibility under EN 1176 and EN 1177
Terrain and natural elements are not exempt from the standard. A boulder used as a climbing element, a log used as a balance beam or a slope used as a slide all require the same things any manufactured equipment requires: a fall zone sized to the height a child could fall from and structural stability verified for repeated use rather than assumed from the natural strength of the material, under EN 1176, plus surfacing whose critical fall height, tested under EN 1177, matches or exceeds the element's free height of fall.
Uneven or sloped terrain adds a further layer of complexity here. Surfacing tested for performance under EN 1177 on a flat, level base does not automatically perform the same way on a slope or an irregular grade, so surfacing choice and installation detailing need to be checked against the real terrain rather than the flat-ground assumption used in a typical layout drawing.
None of this rules out a nature-integrated playground. It simply means the terrain needs to be treated as play equipment from the design stage onwards, with fall zones and surfacing mapped to the site's actual contours rather than sketched onto a flat plan.