If you want to see more of the island but you don't want to rent a car or manage the inconveniences of public transportation, perhaps an organized tour is for you.
Castillo Sightseeing Tours & Travel Services, 2413 Calle Laurel, Punta La Marias, Santurce (tel. 787/791-6195), maintains offices at some of the capital's best-known hotels, including the Caribe Hilton and San Juan Marriott Resort. Using six of their own air-conditioned buses, with access to others if demand warrants it, the company's tours include pickups and drop-offs at hotels as an added convenience.
One of the most popular half-day tours departs most days of the week between 8:30 and 9am, lasts 4 to 5 hours, and costs $40 per person. Leaving from San Juan, it tours along the northeastern part of the island to El Yunque. The company also offers a city tour of San Juan that departs daily around 1pm. The 4-hour trip costs $35 per person and includes a stop at the Bacardi Rum Factory. The company also operates full-day snorkeling tours to the reefs near the coast of a deserted island off Puerto Rico's eastern edge aboard one of two sail- and motor-driven catamarans. With lunch, snorkeling gear, and piña coladas included, the full-day (7:45am-5pm) excursion goes for $70 per person.
Few cities of the Caribbean lend themselves so gracefully to walking tours. You can embark on these on your own, stopping and shopping en route.