King Carl X commissioned the building of the Karlsten Fortress in 1658, strategically placed on Marstrand with its ice-free port to protect Bohuslän from hostile attacks. The fortress, designed to withstand military attacks, features thick, round walls and a multi-storey tower. Today, visitors can imagine the battles that occurred here within its mighty walls.
Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons
Hear this story where it happened, along with the others around it. Say how many days you have and what you are into, and we put together a route through these places, with a voice guide telling each story as you arrive.
Guide me
Basteröds hällristningar 17 km 
The southernmost recorded rock painting in Sweden 20 km 
One of the largest grave fields in Bohuslän 20 km 
The carved stone of the Ytterby church ruin 20 km 
Ragnhildsholmen: The site of a 13th-century fortress 22 km 
The medieval stronghold that stood guard for three centuries 25 km 
The sea fort of Nya Älvsborg 27 km 
The geological plug that resembles Hising Island 29 km 
The Red Stone and its Iron Ring 29 km 
Written by Nik Frost
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