There are more than 8,000 islands along the Bohuslän coast starting in Gothenburg and stretching up to the Norwegian boarder. Most of the islands are car-free and accessible from the mainland by ferry. One of the best-known is Marstrand Island, with the impressive Carlsten fortress, built on the order of King Carl X Gustaf in 1658. The island has long been a summertime gathering place for boaters and the Grand Hotel Marstrand was built at the turn of the last century to provide high society with accommodation they felt was befitting of their standing. Hållö Island, reached from Smögen, with pink granite rocks and crystal clear water, is an ideal place for swimming, snorkelling, diving and exploring the wild nature reserves. Väderöarna Islands (the Weather Islands) are Sweden’s most westerly and home to one of the coast’s largest seal colonies. These islands, numbering in their hundreds, enjoy one of Sweden’s warmest climates and support lush vegetation. Visit the Koster Islands, reached by ferry from Strömstad, for a walking and cycling heaven. Other islands not to be missed include Åstol, Käringön and Gullholmen.