Cruises to South America visit San Antonio, busiest port in Chile, with roots to the 16th century. Stroll the pleasant Paseo Bellamar for local crafts and harbor views. Blocks inland, visit the Municipal Museum of Natural History to see objects made by indigenous cultures, local fossils, and the skeleton of a blue whale. El Yali National Reserve, 27 miles south, has lagoons and marshlands with swans, herons, owls, ducks, Chilean flamingos, and other birds. Enjoy a day of hiking and picnicking.