Galtesund separate the island Hisøy and Tromøy. There is a passenger ferry every thirty minutes that takes six minutes to transport riders from Skilsø to Tyholmen.
Hisøy is an island separated from the mainland by the river Nidelv. The village of Kolbjørnsvik is located across the harbor from Arendal.
Tromøy island is located directly across the harbor from Arendal. Tromøy Bridge a 400 metre long suspension bridge connected it to the mainland in 1961.