It seems that in Gothenburg people were not good at maths. There is quite a bit of evidence of this:
The house number 17½ in St. Nyg: when numbering the house along the street the owner of the building realised that there was an extra doorway but one available address, so the solution was that the extra house would be numbered 17½.
The Osthyveln (“cheese slicer” bridge), which is so low you need to duck down if you do not want the bridge to hit your head.
The ship Vikings moored at Lilla Bommens Torg was bought from Denmark at the end at the 1800s, but since 1966, when the Älvsborg Bridge was built, the boat has been trapped in the harbour. The reason is that the Viking’s tallest mast is 10 meters higher than the bridge, so it is impossible for the ship to take to the seven seas without destroying its masts. Today the ship hosts a hotel, conference centre and restaurant.
It’s worth climbing the Läppstiftet (Lipstick) in Lilla Bommens, as from the 22nd floor you can enjoy a 360° view of Gothenburg and its surroundings.