I took a day trip to Sumidero Canyon which included a visit to the town of Chiapas de Corzo but you only get an hour there.
The tour did kind of feel like a rip off as it cost 200 pesos and is something I could´ve done on my own, I think.
It´s an an hour journey to pier from San Cristobal (will pick you up from you hotel/hostel), the canyon is surrounded by water, the ¨tour¨is 2 hours on the lancha (motor boat) where we see vultures, crocodiles, monkeys and lush greens. Tour is only in Spanish.
There's not much to do or see in Chiapias de Corzo.