area conservation area directions environment environmental protection forest german germany integral nature reserve landscape nature nature protection area nature-sanctuary owl pictogram preserve area protected area protection reserve sign trees wooden sign access Australia bush bush-walking bushland bushland-reserve conservation conservation-area entrance entry fence fenced-off fencing gate limitations limited-access nature-reserve path pedestrians restricted track walkers walking berlin alert appropriate-behavior appropriate-behaviour approval approved bush-reserve care communication concern conserve denied green inform information informing natural not-allowed not-permitted observation observe park permission-denied permitted prohibited prohibition prohibitions protect public-park rules signs warning warning-sign white black red restrictions