Punta Arenas was our Southernmost stay on the South-American mainland. It is a port on the Magellan Straight, and one of the main attractions is the Zona Franca, a duty-free zone which seemed to primarily be full of warehouses for shipping companies, but also catered to the general public, selling electronics, cars, furniture, clothes, perfume and even food.
The Zona Franca was the first place we visited, mainly out of curiosity, but also to see if I could get a good deal on a replacement for my banged-up and hard-driveless Eee-PC. After much walking, we did find a potential candidate, but decided to read about it on the Internet before buying. It turned out to be cheaper to order online in Poland, so that was that.
After the Zona Franca we visited a couple of museums to learn about local history, saw the town cemetary and shared a local speciality featuring barbequed meat, chicken - and lots of mussels. It was a strange but good combination.
From Punta Arenas we took a sunday afternoon tour even further South, to Fuerto Bulnes. It was a funny tour, as we were the only ones taking it, and so our guide just drove us around in his Toyota Corolla, including a brief stop to refuel.