If your trip to Puerta de Tierra is all organized but your travel itinerary is looking a little empty, let us give you a helping hand.If you were to ask a local for sightseeing recommendations, they'd probably point you toward Puerto Rico Convention Center and Castillo de San Cristobal. These popular attractions are sure to leave an impression.There's nothing quite as exciting as discovering new places. While you're in town, Condado Beach and Carolina Beach should be among them. Another popular attraction to add to your itinerary is Plaza las Americas.