arch
architecture
concrete
corridor
deep
destination
end
entrance
interior
iron
journey
light
line
metal
metro
metropolitan
mine
mountain
movement
old
passage
perspective
rail
railroad
railway
road
rock
station
steel
stone
subway
sunlight
sunset
track
traffic
train
train track
transit
transport
transportation
travel
trip
tube
tunnel
tunneling
underground
urban
wall
way