beach colors colours grainy impressions indented light patterns sand shadow textures tire tracks tracks tyre tracks activity churned-up conservation conserving curved curving damage damaged damaging environment environmentally-unfriendly foot-prints gray grey impressed imprinted imprints marked marks off-road-driving over-printed prints rough safety soft-sand surface surfaced surfaces tangled terrain texture textured tire-tracks track tyre-tracks vehicle-tracks vehicles wild evidence footprints Soil work workplace Sardinia white construction dozer equipment mini-excavator tracked seashore steps summer Camber Sands clouds evening sea silhouette sun animals park paw-prints pedestrians walkers