street between inca houses in pisac citadel

wall wadi terrain temple stonewall soil ruins rock geology fortification formation cliff brickwork brick boulder bedrock badlands pisac inca citadel sacred valley peru ancient architecture houses civilization tourist destination valley tourism ruins pisac stone andean peruvian history landmarks street historical site streets stonework heritage archaeological cultural pathway construction paths walkways sites traditional roads attraction heritage exploration culture tourism exploring engineering walking tour settlements civilization historic life town village sites