german dutch and belgian flags at triple border point drielandenpunt les trois bornes dreilandereck, vaalserberg europe

aachen belgium border bornes color country day dreilaendereck dreilandereck drielandenpunt dutch europe flag flags forest frontier german germany holland landmark landscape les limburg meadow monument national nature netherlands outdoor outside panorama park plombieres point region scenery summer three tourism touristic travel trees triangle triborder trijunction triple tripoint trois vaals vaalserberg