In the area around Tidan you find lake Östen, which is a typical floodplain lake, nutricious and shallow. It is one of the most valuable bird lakes in the country, and a very important link in the chain of resting places for migratory birds. The beautiful landscape around the lake bears evidence from thousands of years of human activity, and here you can also find several ancient monuments and cultural sights. Lake Östen, together with the rivers Tidan and Ösan, has connected large parts of north and east Skaraborg. A lot of the findings that have been made in the area indicates a very rich district. On your visit here, do not miss the ancient monuments Kung Ranes hög and Askeberga ship cumulus, or the cultural reserve Vallby Sörgården.
The rune stone is an almost two-metre high granite stone, and on the north side we can read "Grim had this stone carved after Halvdan his friend". The stone is probably from the Viking era, i.e. over 1,000 years old.
The 1.8 metre rune stone in Vallby stands on the old road between Götlunda and Väring, near Grebybäcken stream, which here changes its name to Skeppsbrobäcken. Nearby lies the burial ground Jämmerkullen, which consists of 15 mounds, 50 round stone settings and a stone circle, and down by the stream something that may be two ship settings, 10-14 metres long.