astronomical buildings built by the incans near the summit of huayna picchu in the andes mountains in peru

world wonder vilcabamba vacation urubamba travel tourism terraced summit stunning stones south slopes site sight shrubs serenity scenic sacred ruins remote region province picchu peru peaceful outdoors nature mountains moss machupicchu list landscape landmark incans inca huayna historical hiking high heritage granite forest engineering district cusco cultural cloud built buildings bucket astronomical architecture archaeological andes ancient america altitude