We took in the architecture throughout the city, only occasionally wandering into the dangerous parts. A definite highlight was visiting the aquarium (the largest of its kind in South America) and the technological museum above it. I felt like a kid again, testing my speed in a foot race against a cheetah (I lost), seeing a live thermal image of myself, and lots of other awesome experiments.
I like Medellin, a nicer city than Bogota and Cali, but we quickly learned that during October it starts to rain at 3:00 PM every afternoon. We were caught out twice, the second time whilst attending a free rock concert in the park. We were thoroughly drenched by the time we made it back to the hostel, but the days are warm and the nights pleasant and it is nice to be staying in a smaller, more managable city.
More photos here