belgium-dutch border marker number 112 and maas river

belgium advice alluvial autumn black border boundary concept country countryside dutch enclave environment europe field frontier grass green ground historic history holland land landscape limit meadow meuse monument nature nederland number object parcels plain pole post river rural season sign signpost symbol territory travel valley view water white belgium-dutch marker 112 maas trees belgian village background sunny day maasvallei reserve meers elsloo netherlands treaty maastricht 1843