One of the reasons I have so many photos is because we visited the extraordinary Monte Alban, an archaeological zone 10 km from the city centre that used to be the center of the Oaxaca valley region with evidence to life from 1500 BC! Up on the mountain/hill was a city thriving with people, commerce and politics with views of the natural plains that was used for agricultural farming.
Our tour was in Spanish so I zoned in and out but I do remember that the trees were a big deal, we stopped by at least 5 different types and the guide talked about them in depth for about 5 minutes each.
The centre has lots of things walking distance to each other from the Mercados, numerous Museums and Churches. Part 3 will feature some of my favourite things. Shopping - Food - Cacti! So adios until then.