observation tower in maasvallei nature reserve with senior female tourist waving

adult blue building caucasian country countryside ecology ecosystem elderly enjoying environment europe female field green happy hiker hiking land landscape lifestyle lookout meadow meuse nature observing old outdoor park people person reserve river rural rustic senior shore tourism tourist tower travel trip vacation valley view viewpoint watchtower water wilderness woman observation maasvallei waving next maas trees sky background sunny summer day meers elsloo netherlands