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If swimming in the ocean or the sea is important to you, be sure to research beachside resorts, as many in this region are on stretches of beach where swimming is dangerous or forbidden due to strong currents. Barely visible rocks and strong undertows make many of the beaches unsuitable for swimming. Take care when you go swimming—it can be serenely calm or dangerously turbulent, depending on the day or even the hour. The Pacific side is notorious for rogue waves and intense undertows. Also, the sun here is fierce: don't underestimate the need for waterproof sunscreen and a wide-brimmed hat.