The bishop's men murdered Tumi in 1222 and Guðmundur was forced to flee to Grímsey, where he was intercepted and made a captive once again.
For example, Iceland is known for its midnight sun, even though most of it (Grímsey being a notable exception) is slightly south of the Arctic Circle.
It was named after the latitudinal line of the Arctic Circle which touches the northernmost part of Iceland, the island of Grímsey.
The antipodes of the northernmost of these, Young Island, lie between Flatey and Grímsey Islands off the north central Icelandic coast, about 10 km from either.
Norlandair has three scheduled destinations, Grímsey, Vopnafjörður and Þórshöfn, which it flies in cooperation with Air Iceland.