We've been to Pago Pago three times on cruises. There is usually a market at the dock, plus another market further towards the shopping area, plus a very pretty little church. There is a small museum along the way and Pago Pago also has a marine centre a few minutes walk from the dock which is open to visitors. Most of our photos of Pago Pago seem to be of the buses which are a tourist sight in themselves.