Walked through Netherlands,
Germany, Denmark, Sweden (mayor bit) and Norway in about 7
months. Encountered a few abandoned objects though the abandoned
landscape was more impressive.
Abandoned house in dutch polder
near Kollumerpomp
Old 'bunkers' at Wilhelmshaven (Germany)
.
Abandoned wooden house in Sweden
near Ulricehamn
Fortress at the top of a hill near
Karlsborg. The moat and fortress are cut out of the rock.
Someone cut a hole in the fence.
.
The only open door to the fort proper.
Unfortunately the tunnel soon deadended.
There's a sidepassage leading under
the corrugated steel roof. Maybe one can get to other parts of the
fortress from there but I was not really prepared for underground
exploration.