Puerto Rico is much more than sparkling beaches around every turn. There's really something for every kind of traveler to enjoy—even if spending a lazy day under the sun isn't your cup of tea. Old San Juan, castillos, Fortaleza Street (otherwise known as "Restaurant Row" to the locals), ziplining, rainforests—the list of travel-worthy experiences goes on. Ahead, 23 photos of Puerto Rico's most beautiful sites to kick off your trip planning.