Back Travel Guide Untere Allerniederung Overview Rules Untere Allerniederung A Special Protection Area, or SPA, is established for the birds as a requirement of the Birds Directive. Combined with the Habitat Directive, they make up the Natura 2000 network. Size: 53.83 km² Read on Responsible for this content Outdooractive Editors Verified partner Overview map Start 3D flight End 3D flight Unfortunately, we can not show results in your language here. Show results in any languages in the map Rules Untere Allerniederung Please, keep quiet. Please, do not walk off the trails. Please, do not feed wild animals. Please, do not litter. Please, keep dogs on a leash. Please, do not start model airplanes or kites.