aachen
aerial
aixlachapelle
ancient
architecture
building
castle
church
city
cityscape
day
europe
european
famous
fortress
garden
gate
german
germany
gothic
historic
historical
landmark
landscape
langer
medieval
north
old
outdoor
panorama
park
rhine
rhinewestphalia
ruin
sightseeing
sky
skyline
stone
street
tourism
tourist
tower
town
travel
tree
turm
urban
view
wall
westphalia