Upon arrival to San Juan, head to Condado Beach to relax and soak up the sun. In the afternoon, go shopping at Plaza Las Américas, the largest shopping mall in the Caribbean, featuring high-end stores and local boutiques.
Start the day at the Morro Castle, a 16th-century citadel that boasts panoramic views of the Atlantic Ocean. Next, head to Old San Juan, a UNESCO World Heritage Site filled with historic landmarks such as the Cathedral of San Juan Bautista and Fort San Cristobal. End the day with a romantic sunset dinner at Marmalade, a fine-dining restaurant specializing in fusion cuisine.
Experience nature at El Yunque National Forest, the only tropical rainforest in the US National Forest System. Go on a hike to discover hidden waterfalls such as La Mina Falls and enjoy breathtaking views of the lush forest. End the day with a leisurely dinner at La Estación, a charming restaurant housed in a renovated train station, featuring local cuisine.
Enjoy a full day of relaxation at Isla Verde Beach, a long strip of golden sand and crystal clear waters. Rent beach chairs and an umbrella, sip on cocktails, or indulge in a couple's massage by the sea. End the day with a romantic sunset dinner at Oceano, a beachfront restaurant serving seafood and Caribbean cuisine.
If you have more time, explore more of the island's outdoor activities such as scuba diving, surfing, or visiting the bioluminescent bays. For a shorter trip, consider removing either Plaza Las Américas or La Estación from the itinerary. Also, keep in mind that many businesses and attractions may have different hours of operation or be closed on certain holidays, so make sure to plan accordingly.