If you're looking for places to visit in Puerto Rico, but you don't know where to start, you've come to the right place.Puerto Rico is a relatively small island but it's home to hundreds of natural wonders, attractions, and places to visit. But, some of the best places are hidden gems that only a Puerto Rico local would know about. Lucky for you I am that local and I'm all ready to tell you about them! Since I want you to discover the best of my island too, I've put together a list of the best places to visit in Puerto Rico, so you don't miss a single thing.Old San Juan is full of history, food, and culture. In a relatively small area, you will find many of the things to do in Puerto Rico that are top of my list of stuff tourists shouldn't miss in a visit to Puerto Rico.Specifically, visitors can walk on cobblestone streets and enjoy the historical city during the day and the energetic nightlife during the night. As you walk around discovering Old San Juan, be sure to visit San Juan's Gate, La Capilla del Cristo, El Paseo la Princesa and La Fortaleza. With impressive biodiversity and refreshing waterfalls like La Mina Falls and La Coca Falls, El Yunque National Rainforest is one of Puerto Rico's main tourist attractions. Standing as the only tropical rainforest in the United States, El Yunque National Rainforest makes one of the best day trips from San Juan for nature lovers and those looking to escape the island's heat.Besides Mosquito Bay, one of the bioluminescent bays of Puerto Rico, Vieques is home to the only black sand beach of Puerto Rico, Playa Negra, and the tranquil Sun Bay Beach. If you are a history buff, you definitely can't miss the Punta Mulas Lighthouse or Fortin Conde Mirasol, the last Spanish fort built on the American continent.The Rio Camuy Caves are one of the natural wonders you can visit in the country and it opened only recently after the recovery from Hurricane Maria. The Rio Camuy Cave system was created by the Camuy River, the third-longest subterranean river in the world. The cave system sports 220 caves and caverns with massive stalactites and stalagmites that will impress any traveler.A lot of visitors go to Isla Culebra to find Playa Flamenco, one of the most paradisiacal beaches in Puerto Rico. Honestly, it’s one of the top beaches in the world. Playa Flamenco sports white sand and turquoise calm waters that make Isla Culebra your ideal getaway day trip.Castillo San Felipe del Morro, also called El Morro, is a 16th-century fortress built by the Spaniards to defend the country from sea attacks. Puerto Rico’s most iconic landmark, El Morro is one of the best places to visit for its historic value and amazing architecture. The fortress is also a popular place for reunions and local activities in San Juan Puerto Rico.Old San Juan and Ponce are sister cities in the historical sense. If you love Old San Juan then you must pay a visit to Ponce’s historic city. Although similar to San Juan in some aspects, Ponce sports its unique charm and is home to top attractions like the oldest firehouse in Puerto Rico, La Guancha, and the Ponce Museum, where you can find the famous “Flaming June”.If you like surfing, watersports, humpback whales, or magnificent sunsets, just add Rincón to your travel list! You can find everything that you expect from a Caribbean island in Rincón. This city is popular for having breathtaking sunsets and perfect beaches for surfing. The city’s center sports great restaurants, galleries, and souvenirs shops.If you´re already in Vieques, don´t miss the chance to kayak in Mosquito Bay, the brightest bioluminescent bay in the world by the Guinness Record Book. Mosquito Bay is one of the three bioluminescent bays in Puerto Rico, but it’s the one in the best conditions after Hurricane Maria.