white red edged sign in a frozen lake with black inscription: "eisfläche nicht betreten lebensgefahr"

advice ban botanical garden dafrac14 sseldorf caution chilly close cold crusted over danger dangerous not edge enter forbidden frozen germany ground ice layer iced isolated lake landscape language nature note plate pond red safety scripture season sheet shield shore sign signage snow surface symbol tip break crust travel walk warning water white winter wintertime edged black inscription: eisflã¤che betreten lebensgefahr which translates floor life funny typical german info eisfläche