One of Sandra’s students, who had become a friend wanted to walk in Parque Arvi, a large national park in the mountains above Medellin, and invited us along. Unfortunately, she pulled out at the last moment after a big night of salsa. Sandra, Julian and I decided to go anyway, and caught the cable car up to the park only to find that we had to pay for a guided tour, which turned out to be less than one kilometre long. We later learned that the idea is to walk from the edge of Medellin up the hill to the park rather than taking the cable car. This walk is still on our list to do properly.