October 3 Oaxaca to Tuxtla and San Cristobal

I can't believe that we lost a great deal of text which covered two very interesting days! It is never the same when produced for the second time, but we will try.
Left Oaxaca to fly to Mexico city (1 hour and 10 mins) which was a very early start at 5.00 am, then a reverse flight back to Tuxtla (1 hour and 25 mins). Guide and driver collected us and took us to the Sumidero Canyon for a boat ride along the river which is dammed behind a very large HEP plant. The canyon is edged with very high vertical rock walls, rising up to 1,000 metres in places. We saw plenty of very green vegetation, a monkey in a tree by the river, a very large crocodile on the bank, large flocks of vultures living beside the river, and many white water birds like cranes.
We then continued to our next stay at San Cristobal de la Casas.
We are not to refer to the original population as "Indians", but "Indigents", according to our guide.
Street dogs appear reasonably healthy, and are exceptionally good "street cleaners".
We could not find the switch to turn off one of the wall lights in our room, so eventually called for help from reception. It was easy to find once you knew where - behind a very large mirror in a frame on the wall!!
Had dinner at a good restaurant recommended by our guide - ate capsicum stuffed with a delicious filling served with rice. Mexican and Chilian red wine are quite good and not too expensive.