This is the historic center of San Juan. You can walk around and absorb the beautiful spanish architecture. Check out the history of Castillo San Felipe del Morro, Castillo San Cristobal, La Fortaleza and more. Eat amazing food at Deaverdura or Restaurante Raíces (for some traditional bites), drink delicious coffee at Cuatro Sombras, and dance the night away at La Factoria - when you're not at the wedding of course!
Obsessed with this restaurant and it is in the Condado area.
Stunning ocean views and great food
If you have time for a day trip - check out El Yunque for it's natural beauty and waterfalls. There are hiking trails, animals, and yes you can get in the water!
Some of the most beautiful beaches on this planet can be found in Culebra, Culebrita and Vieques. This is absolutely a day trip at minimum, so only go if you have the time to enjoy! If you do, it's a must. There are options to also rent private boats.
If you're into breweries, this is a great place to go. It's also right next to Vivo Beach Club which is a lot of fun (assuming it's open for a public event the day you go! It's a private club, but at times sells tickets for public events).