An eight-hundred-year-old, pre-Inca settlement, PURUCHUCO comprises a labyrinthine villa and a small but interesting museum containing a complete collection of artifacts and attire found at the site (all of which bears a remarkable similarity to what Amazon Indian communities still use today). The adobe structure was apparently rebuilt and adapted by the Incas shortly before the Spanish arrival: it's a fascinating ruin, superbly restored in a way which vividly captures what life was like before the Conquest.