Tyr Island is a location briefly mentioned on Hiccup's Map.
There is an image that appears on Hiccup's Map. However, it is rather nondescript - brown with no indication of contour or vegetation. Some of the shoreline appears to be darker brown - this might indicate beaches or perhaps mud.
Tyr Island does appear on the Interactive Map on the Dragons: Race To the Edge website. The island thus far is not featured in this TV series, however, nor has any sort of description.
- Tyr is the one-handed God of law and heroism in German and Norse Mythology.