San Antonio Polapo is about a twenty minute ferry ride from San Pedro across the lake. There's really not a lot to see here other that the main church which is dramatically poised on the top of a hill with an eagle's eye view over the lake. The view itself is worth a trip, but you'll also have the opportunity to see the local Kaqchikel people. Interestingly, this place is a lot less touristy than Pana or San Pedro and the local traditions seem to be especially alive. You'll notice this in the dress of the people. Women were red striped huipiles, red headribbons, and blue skirts and the men dress in similar striped shirts and pants with a small woolen blanket called a rodillera around the hips.
There is a boat dock in San Pedro that serves nearby Santiago Atitlán, a nice little excursion from here. Upon arrival in Santiago Atitlán, you're likely to be swarmed (maybe that's too strong a word) by kids trying to take you to the Mayan saint Maximon (more on him on my Santiago Atitlán page) for a small fee. The main street from the lake that leads to town is lined with stalls selling just about everything that is sold in Panajachel, but the prices are probably a bit better here. There's a nice church here and it's another cool town to observe local traditions.
San Pedro doesn't have a lot of actual cement streets. I saw a map painted on the wall of a restaurant that showed a couple main streets and a bunch of dotted lines representing "footpaths" which are just narrow dirt paths like you can see in this picture. I was glad that we weren't here in a rainstorm as I can imagine it would be a sloppy affair! These paths are not clearly marked, but fortunately the town isn't big enough to get lost for long.