gomantong caves in sandakan division, sabah, malaysia, the largest limestone outcrop in the lower kinabatangan area, colony of the

wrinklelipped view tropical travel tourist swiftlet swift sun stone smell scenic sandakan sabah rock reek plicatus old nest nature natural mountain malaysia limestone light landscape kinabatangan hill harvest guano gomantong gloomy geology freetailed exodus delicious dark colony cockroach chinese chaerephon caving caves cavern cave borneo bird beautiful bat asia adventure division largest outcrop lower area wrinkle-lipped free-tailed