you can walk to the center where you will see very nice medieval streets and 3 min away the Fish Market. WE enjoyed this city more than we thought based on some reviews. Very interesting items are sold at the market such as whale sausages and very brown goat cheese or cloudberry jams :)
Nothing very interesting at this port, unless you travel to London, almost about 2 hours away.
We had the worst weather there and it was a Sunday, the city empty, rainy and dark... We went to city ourselves, which was very close from the port. Unless you plan the whole day in the city, DO NOT take the HOHO ticket as you can walk to most of the city center monuments and ICE BAR. It was not an impressive city but we really liked the ICE BAR, worth a visit.