brown grass green ground mark nature path road route rural saavem track tyre way wheel wheeled downhill fence ocean sea shadow wood uphill auto car cold lorry snow trace traces trail wind winter blue horizon line sky water bicycle follow footstep print sand step control controlled distinctive equipment handle heavy-duty industrial inlet marked measure measured meter pipe piped pipes supplied supply tap valve water-mains 4WD-vehicles beach churn churned-up churning coast coastline colors colours conservation conserve conserving damage damaged damaging driving dug-up environment environmental environmentally-unfriendly four-wheel-drive marks ocean-edge off-road off-road-driving prints protect protection rough safety soft-sand surface surfaced surfaces tire-tracks tracks traction tyre-tracks vehicles vehicles-permitted wild army barrel british cannon cutout fire gunnery heavy history isolated light military ordinance ordnance shooting shot war