The Museo de Arte e Historia de Dorado gives you the rundown on local history and archaeology. Admission is free.
The Museo del Plata showcases local art, sculpture and paintings. Admission is free.
The Museo y Centro Cultural Casa del Rey is an old Spanish garrison that displays antique furniture. Admission is free.
Although nobody is advertising it, there is, in fact, a public beach in Dorado where you can swim. Balneario Manuel Morales is at the end of Rte 697. But it’s a rather boring bit of sand surrounded by rocky outcrops…
Toa Alta’s beach, Punta Salinas, lies about 20 minutes east of Dorado on Rte 165. It’s got food kiosks, lifeguards, restrooms and basketball courts.