One of the best beaches on the Cape Peninsula, Boulders Beach, is located a few kilometres to the south of Simon's Town. Here small, secluded coves with white sandy beaches and calm, safe, warm, shallow waters are interspersed between huge rounded boulders of Cape granite that form low cliffs and small caves. There has been a colony of African penguins at Boulders Beach since 1985. There is no record of the birds having lived here prior to that date, so their decision to settle in an area already well-utilized by humans is remarkable. There are only three penguin populations on the mainland in southern Africa. (The others are on islands).