Overseas emigration of the Dutch started around the 16th century, beginning a Dutch colonial empire. The first Dutch settlers arrived in the New World in 1614 and built a number of settlements around the mouth of the Hudson River, establishing the colony of New Netherland, with its capital at New Amsterdam (the future world metropolis of New York City). Dutch explorers also discovered Australia and New Zealand in 1606, though they did not settle the new lands; and Dutch immigration to these countries did not begin until after the Second World War. The Dutch were also one of the few Europeans to successfully settle Africa prior to the late 19th century.