Olsborg Castle
Tanum Municipality, Sweden · built 1502
Olsborg Castle (Swedish: Olsborg), also Olofsborg, was a fortified castle located in Tanum Municipality in Bohuslän, Sweden. It is situated on a steep cliff, and might previous to later use been an early hill fort.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).