If your trip to Old San Juan is all booked but your travel itinerary is a little on the empty side, let us give you a helping hand.Set your rental car's navigation system to San Juan Cathedral. As one of the most famous landmarks in Old San Juan, you'll want to make sure it's at the top of your travel plans.Castillo de San Cristobal and Convento de Los Dominicos are some fascinating attractions that are easy to reach from this neighborhood. Whether you join a tour or see them at your own pace, it's sure to be an unforgettable day.Leave that rental car at the hotel and exercise those legs. Not far from the center of this neighborhood, Castillo San Felipe del Morro is worth a look. Plaza de Armas and Museo de Casa Blanca are some other nearby attractions that lure lots of travelers like yourself.