adventure
asia
background
beautiful
bridge
bright
china
color
colorful
danxia
destination
gansu
geological
geology
geomorphology
hanging
high
hiking
hill
landform
landscape
light
mountain
nature
orange
outdoor
park
peak
rainbow
rainbow mountain
red
ridge
rock
sandstone
scenery
scenic
sky
stairs
steps
tour
tourism
traditional
travel
trek
trekking
vacation
view
zhangye