architecture barrier building danger house iron bars landslide precaution protection roof roof avalanche safety security snow snowslide winter avalanche canada conifers forest lake landslip mountain natural nature rock Rockies Rocky Mountains shore beach beware caution cliffs cornwall England english falls Great Britain grunge grungy red sand sign stand warning defiance disregard folly foolhardiness foolharsy fools hazardous idiocy idiots ignored peril reckless stubborn stupidity vulnerable