We finally made it to a WHS my wife was more excited about than I was. I knew we would pass through this WHS somewhere along the road between Armenia and Salento at the very least but like others before us, were unsure of the exact boundaries. So we adopted our own interpretation of what we were supposed to be seeing/doing there. For the cultural part we visited Salento and nearby Filandia, both nearly identical in appearance with pretty, colourful buildings spreading outwards for a few block radius from their central squares. This is tourist central, especially on the weekend with all the local tourists day-tripping in.
We also observed the landscape within the core zone, both as we passed through but also from several viewpoints around Salento and especially Filandia where there is a tall wooden observation tower from which you can see all the surrounding villages as well as Armenia. There wasn't as much coffee growing here as we expected considering the importance of the crop to the local economy. We visited a family run coffee finca too and took the tour. It might've been within the buffer zone but we aren't sure. This seemed a fair example with their traditional methods still preserved unlike some of the larger, commercial operations. We learned quite a bit in the process and found it worthwhile. My wife insisted on drinking copious amounts of local coffee so we nailed that part too ;)