One of the best things to do in Mazatlan, Mexico is spend the day visiting some of the resort town’s many miles of shoreline. This famous Mexican Riviera destination has plenty of fine white-sand beaches to choose from, each with its own vibe. Two of the most popular are laid-back Playa Olas Altas and lively Playa las Gaviotas. Drinking tap water in Mexico is not advised. Some restaurants and bars in Mazatlan serve bottled water to visitors by default, but make sure to ask if in doubt.