Plaza Colón is the central square in the old town of Arica. Surrounded by massive palm trees is an ornate water fountain. When not the venue for a public celebration or event, this is a great place to escape the sunny days of November through May when the average temperature is in the 70°s Fahrenheit. The air is arid in Arica. It claims to be the world’s driest city. Average annual rainfall is only about .03 inches annually.