The latest inland ice was 3 km thick and its weight left a big dent in Scandinavia. Since deglaciation (which is, on the geological time scale, a current event) the dent has been straightening out. This causes land uplift. But just outside the edge of the dent, it causes the land to sink. Southernmost Scandinavia is losing land to the sea, not gaining it.
The fulcrum of this see-saw crosses Lake Vättern right at its southernmost point. The lake is receding at one end and encroaching at the other. This is why there is an Early Bronze Age burial cairn (Raä 140:3) and sacrificial bog (Raä 140:4) on the lake bottom off the town of Huskvarna . The cairn was originally built about 1400 cal BC on a hilltop above the lakeshore, in a location where it would be widely visible from boats. It didn’t turn out that way.
Later the cairn was joined on the lake bottom by Sanda parish’s Medieval church.
I’ve written before about Huskvarna on the subject of the substance abuse epidemic that decimated two generations of the town’s industrial workers in the 20th century.
Update following day: my knowledgeable colleagues Staffan von Arbin and Claes Pettersson point out that only one cairn is actually known at present, not several as I implied in the original wording.