mature woman climbing a coastal dune among the white sand with her dachshund with the beach and sea in the background

active adult adventure backpack backpacking beach blue coast coastal coastline dune dunes dutch environment europe field grass groet happy hargen heathland hiker hiking hill holland idyllic landscape lifestyle mexican nature netherlands north ocean path people person reserve sand sandy schoorl sea seashore seaside smiling sport spring sunny trail travel trekking view walking water woman