30 km further lies Kamień Pomorski on the Szczecin Lagoon.
And with this stone it's the whole story:
"Głaz Królewski (also Kamień Królewski, German: Großstein / Grossstein - boulder stone from granite, known for its legends and its large dimensions - height about 4 meters, circumference about 20 meters.) Formerly the size of the boulder was three times larger, however The boulder is found in the waters of the Kamieński Lagoon, near the northern shore of the Chrząszczewska Island, which was brought to Poland from eastern Sweden by the continental glacier.
According to a legend, after mastering Pomerania in 1121, Bolesław Krzywousty accepted the parade of sailors standing on the Royal Glaze. The name of the nearby town, Kamień Pomorski, probably also comes from the stone.
Other legends relate to the creation of a stone - according to one of them, when a huge toad wreaked havoc in the waters of the Lagoon, the god Trzygłów after hearing the prayers dropped a thunderbolt on it, turning it into stone. The second legend explaining the origin of the boulder speaks of a devil banished from a nearby town who promised to find a giant partner if he destroyed this castle. The suspicious giant, however, wanted to see his partner first. In fact, the ideal candidate emerged from the water, but at the moment when he crowed the hens, it turned out that in the waters of the Lagoon instead of a partner for the giant there is an insidious devil. An angry nervous man threw a huge boulder at him. This one, wanting to escape, turned into a frog, but he did not make it and the stone overwhelmed him, and he has been bonding to this day.
A different theory on the meaning of the erratic stone is presented by UFO enthusiasts. According to them, this stone was placed by extraterrestrials in a precisely defined place as an element of a navigation grid, and inside it there is a suitable apparatus for this. The stone was identified by ufologists as A13."
