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High ropes course with informational signs about the different trees as you go along.
Though more tourists visit here as part of a tour from San Cristóbal de las Casas, the viewpoints over the top of the canyon are actually accessed from Tuxtla, and are convenient to visit from the city center if you have your own car. For more info on the canyon, see the Cañón del Sumidero article. Though the entrance (marked on the map in this article) is accessible by colectivo Route 69, the actual viewpoints are many kilometers up the road through the national park, and the staff at the tollbooth won't let you in without a car except during "athlete" hours from 6-8 in the morning. It's possible to tour all the viewpoints by taxi for 500 pesos (total per car), but keep in mind that you may get the same thing for cheaper if you take a tour through a tour agency that also includes the boat trip through the canyon.
A spacious zoo which hosts only animals that can be found in the region naturally. In fact many of the animals roam the area freely and are not kept in cages. Don't miss the Museo del Cocodrilo while you're here.
The city's central plaza, surrounded by the cathedral, state government buildings, and some cheap food options that stay open late.
A lively alameda-style park where they have regular marimba concerts. The concerts start at about 6 and go on until late.
Museum of the Marimba, right beside the Parque de la Marimba.
Another Catholic church, this one with notable stained glass and a painting. Lots of pigeons when you're hanging around the bell tower outside.