ln the 15 th century the lncan emperor pachacutee built acity in the clouds on the monutain known as machu picchu ( oid mountain ). tgis extraordinary settlementain lies half way up the andes plateau deep in the amazon jungle and above the urubamba river. lt was probably abandoned by the lncans because of a smallpox outbreak. and after the spanish befeated the lncan empire the city remained lost for over three centuries. lt was rediscovered by hiram bingham in 1911.