In the Huasteca you can climb the walls of the mountains wich are crossed by the Santa Catarina River, this experience is wonderfull in all the year.
You can take photos, eat and enjoy of the landscape
Exist very much routes of buses for Santa Catarina. For example, 120, 126 La Fama, 126 Castillo, 128, 128 Fome, etc.
But some cars of these routes are not in optimal conditions. It's serves for trainsport, but are not completelly beautiful.
If you want a good service you can receive it in all buses of the routes 120 and 6. Other good option are the taxis, but take care of these. Call one from the yellow pages for avoid any abuse.