英文關鍵字
abandoned
above
aerial
asen
bulgaria
clouds
copper
danger
diamond
ecology
geology
gold
huge
industrial
industry
iron
large
metal
mine
minerals
mining
mountain
nature
near
open
ore
pit
quarry
rock
sky
stone
tsar
view
village
water
winding
英文關鍵字
abandoned
above
aerial
asen
bulgaria
clouds
copper
danger
diamond
ecology
geology
gold
huge
industrial
industry
iron
large
metal
mine
minerals
mining
mountain
nature
near
open
ore
pit
quarry
rock
sky
stone
tsar
view
village
water
winding