Two men walk along the side of the Great Wall of China at Mutianyu, north of Beijing (formerly Peking), China

2 men 2 people activity vacations adventure travel alongside ancient antiquities antiquity barriers castellated walls china chinese east asia eastern culture exotic locations far east force fortified high walls historical sites landmark long walk next to the wall old stone on the outside paths protection stone walls strength the great wall tourism site tourist destinations tourist site walk walking holidays western tourists wonders of the world world heritage site barrier boundaries boundary daytime defence fortification full length full lengths historic site horizontal landscape limestone looking up mature adults outdoors outside place places of interest real people side view stock image stock photo stock photograph tourist attraction tourist sight travel destination travel photo travel photograph travel photography travel stock travels two men two people vacations walkways world culture travel travel destinations chinese culture chinese ethnicity chinese appearance asian ethnicity asians 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