Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Island in Sarpsborg, Østfold, Norway
Karlsøya is an island in the municipality of Sarpsborg, in Østfold county, Norway. Before 1992, Karlsøya was a part of Skjeberg municipality. The island's only connection with the mainland is a bridge that connects the island with the peninsula of Ullerøy.