Situated at the mouth of the River Hull, the Deep is an iconic building housing a world important aquarium. It calls itself a submarium. The building was designed by Sir Terry Farrell so you know who to blame. You can find out more here. Lots of people have been to see the little fishes go round and round. I guess the fishes would rather be somewhere else.
The odd looking thing in the background of the second photo is the Hull tidal surge barrier which has been keeping the city dry for a couple of decades.