機器
1982
aha
ancient
blue
brown
chimney
closed
cultural heritage
factory
germany
heritage
historic buildings
historic sites
history
industrial
industrial heritage
industry
iron
iron work
iron works
ironworks
landmarks
large
mechanics
metal
modernization
nature
neunkirchen
old
past
pipeline
pipelines
restored
rust
saar
saarland
scenery
scenic
sightseeing
sky
station
steel
steelmaking
symbols
tower
visit
work