It is on Swedish road signs indicating a sight/attraction/monument, usually an ancient one.
It is a stylised ribbon/snake pattern that resembles one that you could find on a rune stone. <https://xn--vgmrken-5wac.se/tag/sevardhet/>
A variation of the symbol is also the symbol for the National Heritage Board, which is in charge of protection of ancient monuments.
A variation of the symbol is also the symbol for the National Heritage Board, which is in charge of protection of ancient monuments.
The road sign for "Camp ground" has a stylised tent: <https://xn--vgmrken-5wac.se/tag/campingplats/>