"Vikings" was primarily filmed in Ireland, specifically at Ashford Studios in Wicklow.

Where in Canada was Vikings filmed? 

In Canada, Vikings was filmed in the province of Ontario, specifically in the city of Toronto.

Where is Kattegat filmed in Vikings? 

The scenes set in Kattegat, the hometown of the Viking warriors in the show, were filmed at several locations in Ireland, including Wicklow, Wexford, and Dublin.

Where is floki's island filmed?

Floki's Island, which is depicted as a remote and mysterious location in the show, was also filmed in Ireland. The specific location used for filming is not publicly disclosed.