ancient
antique
asia
barrier
bastion
beijing
border
boundary
brick
china
colossal
culture
defense
dynasty
emperor
fence
fort
fortification
fortress
frontier
gorgeous
great
grunge
heritage
hill
history
iconic
invader
labor
landmark
masonry
military
ming
monument
mountain
mutianyu
old
peak
peking
protection
qin
ruin
steep
stone
symbol
tower
wall
watchtower
wonder
world