The ancient Great Wall of China snaking through mountains at Mutianyu, north of Beijing (formerly Peking)

activity vacations adventure travel ancient antiquities antiquity barriers castellated walls china chinese distant east asia eastern culture exotic locations far east far reaching view force fortified high walls historical sites landmark long distance long walk mountainous region old stone protection snake like snaking away stone walls strength the great wall tourism site tourist destinations tourist site walking holidays watchtowers wonders of the world world heritage site barrier boundaries boundary daytime defence distance fortification full length full lengths historic site history horizontal landscape limestone mountain old outdoors outside place places of interest stock image stock photo stock photograph tourist attraction tourist sight tourists travel travel destination travel destinations travel photo travel photograph travel photography travel stock travels typical vacations views world culture chinese culture international landmark national landmark landmarks tourism destination sightseeing travelers visitors visiting travellers traveler traveller visitor visit sightseers world cultures culture national culture color image color colour scenic scenics landscapes landform landforms