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27 levels of waterfalls, elect to do as many as you like, it costs more to do more. You will be provided with guide(s) to help you out. They provide life vests and helmets. On the way back down you'll slide down the chutes or jump into the pools. It's a protected area, and many excursion companies come here, but you can also get there yourself.
Located at the edge of Puerto Plata bay
Historical fort located by the main bay of Puerto Plata. The smell of diesel exhaust is pervasive since it's right next to the main electric generator for the city, which burns diesel. There are many local vendors who are quite persistent at trying to sell you goods at tourist prices. In front of the fort is a nice grassy area that's good for a picnic overlooking the water.