Keywords: Doublebordermarks.jpg Double border mark 561 at Dutch side left and German side right next to a bridge over the river Kendel Hommersum Germany Own 2007-09-15 LooiNL 51 41 22 793353797310942 N 6 1 45 34515380859375 E Hommersum Boundary stones in North Rhine-Westphalia Boundary stones in the Netherlands |