Bohus-Björkö is one of the biggert islands in Gothenburgs archipelago. There are many restaurants, child friendly swimming spots, a guest harbour and Restaurant Seaside hotel and hostel.
The harbour area has a handful of places to check out including a small convenience shop, a pizzeria and a brittish pub. If you walk north of the harbour, you will find a good swimming spot which overlooks Källö-Knippla which is a superb place to take a break if only for the view.
From Björkö you can reach the islands Kalvsund, Grötö, Källö-Knippla and Öckerö by ferry. Tickets and fares by Västtrafik public transport. Free trip with the Gothenburg City Card.