There are 4 Trolley routes you can take and all of them are free. These trolleys do not provide tours so there is no tour guide to explain what you see along the way. If you need to sit for a while they are a good place to get where you are going. Just know they will not get you there quickly. Also, there is no schedule of pickup times.
Trolley Routes: Note trolleys are not running at this time. They will be back. Try the Garitas!
The yellow trolley stops at or within a block or two of the following places, listed in no particular order: Paseo de la Princesa (U), Felisa Rincón de Gautier Museum (O), La Rogativa (P), San Juan Gate (Q), La Fortaleza (R), Parque de las Palomas (S), Capilla de Cristo (T), and El Morro (A).
The red trolley stops at or within a block or two of the following places, listed in no particular order: Paseo de la Princesa (U), San Juan Tourism Office (V), Plaza Colón (X), Teatro Tapia (Y), Alcaldía (K), Plaza de Armas (L), and San Juan Catedral (M).
The green trolley stops within a block or two of the following places, listed in no particular order: El Capitolio (Z), Forte San Cristóbal (B), San Juan Art & History Museum (J), Plaza Quinto Centenario (F), Plaza San Jose (H), Pablo Casals Museum (I), Cuartel de Ballajá (D), El Morro (A), Paseo de la Princesa (U), Plaza Colón (X), and Teatro Tapia (Y).
The blue trolley route is the longest of all and stops at all of the red and green stops.
All trolleys stop at the cruise ship pier.
Garitas are little golf type carts that travel around Old San Juan. If you see one with no passengers, you can flag it down and the driver will take you where you want to go. They are free to ride.
For more information on the trolleys and garitas:
Puerto Rico Tourism Company
500 Calle Tanca