All the gates close at 6 pm, except for the Seneto Descent Gate which closes at 4 pm
Wikipedia https://ko.wikipedia.org/wiki/응고롱고로_분화구
Official Website http://www.ngorongorocrater.org/
UNESCO Website http://whc.unesco.org/en/list/39
좌표 -3°3'40.938" N 35°22'17.533" E