On maps from the 17th century, there is a pier between Marinbasen and Smörbyttan - but for some reason it was never built.
Now the marine archaeologists are investigating what kind of ships have been sunk at the site of the pier and why.
- If you think one step further, when you dive down there among planks and seagrass, that this could be the big three-decker Erika Eleonora, it will be a different perspective, says Patrik Höglund, marine archaeologist at VRAK.
Follow us into the depths where marine archaeologists are searching for the secrets of the wreck.