The city of Cusco was once an ancient Inca city. Cituated at a high altitude of 3400m (11250ft) just east of the Andes. Upon arrival you can feel the thinness of the air and draw heavier breaths. The Spanish Conquistadors took over the city around 1535. Looking around you'll see buildings built upon the stone remnants of the Incan empire. There are many Inca ruins within the city limits to see.