The next major area on most tourists itinerary would be Lake Atitlan, a beautiful volcanic lake surrounded by mountains and volcanos on all sides, and dotted with both local and touristy towns on the lakeshore all around. The main town of interest to Frum travelers would be "San Pedro La Laguna" as you will find the Chabad house here (yellow flag) and 3 kosher restaurants. The town is very central on the southside of the lake and has beautiful views of the surrounding nature.
View of the Lakeshore and Chabad.You should be able to recognize the Chabad House in the above picture, with it's prime location right near the lake, and within a 2 minute walk from where the Lanchas (lake boats) depart from to other towns around the lake. The lanchas are cheap, with most rides around the lake costing around $1-3 US and they go generally as soon as they fill up, and frequently throughout the day.
The 2 main towns are San Pedro La Laguna - where the Chabad is - and Panajachel (or Pana as referred to), which is a larger town and closer to main highway, so it has more transportation options and connectivity. Between the 2, San Pedro has more to do, has a better view of the lake IMO, and closer to other attractions in the area, such as Indian Nose, Volcan de San Pedro, Coffee plantation tours etc. San Pedro to Panajachel is about a 25 minute boat ride across the lake, Pana is on the north side of the lake. Other towns around the lake include San Marcos (roughly equal distance to Pana and San Pedro), where people go for Yoga and Meditation retreats, energy healing, massage, spas etc.
Chabad here attracts mostly an Israeli crowd (unlike Antigua where you have many others too), and Hebrew is pretty much all you will hear being spoken. The same is true around the town of San Pedro, where you will hear Hebrew throughout town, probably more than Spanish, at least in the touristy part near the lakeshore. Chabad has 3 restaurants in San Pedro:
1) Espresso Café Bar - this is a dairy eatery. They serve Panini's, coffee, smoothies, pasta, pizza, and similar stuff. Prices are a bit on the higher end at this location, compared with drinks at other places around town.
2) Ha-Falafel - They sell Falafel

- They also sell Shawarma, Pargiyot, Kebab etc.. Pretty small menu but all very reasonably prices, and the cheapest of the 3 places. Sandwiches ranges from $3.50-$6.00 or so. They are open from 10am to 10pm.
3) Jerusalem Restaurant - while the 2 above are located on either side of the Chabad house, this one is located in the Chabad house on the 2nd floor. Small menu of Schnitzel, Couscous, Burgers and one day a week they do Shakshuka, pretty sure that is the extent of it.
The main tourist "street" where Chabad is located.If you are sensitive to noisy/loud places you may want to reconsider staying in San Pedro, or maybe just visiting as a day trip from another town. The town is NOISY! Between the nonstop loud music playing through the night, the backpacking partying, and the stray dogs barking throughout the late night and early morning, this is not a quiet place at night!