You know how Wikipedia is, you start with an innocent search for "kraken", this leads to that and sooner or later you're neck-deep in 16th century cartography. I found two awesome maps that illustrate why, amongst other things, you should never attempt to sail to Iceland.

The first is the Carta Marina, which (poorly) maps Scandinavia. I really think the geographical features were merely incidental, and the main purpose of this map is to warn of the certain doom that awaits between your present location and anywhere else on the planet.

Available big and huge

Secondly we have Abraham Ortelius's map of Iceland. This seems to be how tariffs were enforced in the 1500's. I assume that taxes were just too difficult to collect from vikings, so in order to prevent the import of cheaper, foreign goods the monarchs commissioned and propagated maps like these to convince traders that coming to Iceland will get you ripped apart and devoured.

Bigness here.