英文關鍵字
abandoned
adventure
ancient
antique
arch
burrow
catacomb
cave
color
corridor
dark
deep
dirt
doorway
entrance
eternity
exploration
feature
fort
freedom
gloomy
history
land
light
material
mining
mystery
narrow
natural
nature
object
obsolete
old
open
passage
past
penetration
phenomenon
pit
prison
ravine
rusty
science
silence
staircase
steps
stone
tunnel
war