Antigua is very compact and easy to walk around. Most tourist destinations are in an 8-by-8 block area less than 1 km across. You can walk across it in 15 min. Be careful: the sidewalks are narrow and not always in good repair, you may have to walk in the street with traffic whizzing by you, and at night it's worth being cautious and aware of your surroundings. The standard tourist map are linear in their drawings. They are accurate only near the town center, as their periphery are indistinct and inaccurate. Get a real map with accurate topography if you are seeking locations farther from the town center, as dead ends and curved streets are not portrayed accurately.
If you don't know the city streets too well, and it is past about 11 p.m., it is best to get a taxi back to your accommodations from Parque Central, especially if you're alone or going more than a few blocks away from the well-lighted Central Park area.
To reach Guatemala City, one simply ask for the main route of the chicken bus. They stop at every corner, honk the horn as early as 5:30AM, and yell out loud "GUATE, GUATE". It is common to see one bus every 4-5 min leaving from the same corner. Buses to St. Pedro, St. Juan and or St. Ana leaves every 10 to 20 minutes; These are best obtained at the Mercado or at St. Lucia church as they often do not follow the same set route through town.
Tuk-tuks and taxis can take you to destinations within the city center for Q10 or less--negotiate the fare with the driver in advance. Otherwise, they will routinely charge 50-100% more than they should. Tuk-tuks usually do not go to Guatemala City, so one will need a shuttle or taxi instead. Flag down a cruising tuk-tuk, or pick up a taxi from the queue at Parque Central; or along a main route to the city's periphery.
