He is buried in Hálskirkjugarður við Hamarsfjörð - here is a headstone for him and his wife (the exact location of their graves is not known): www.legstadaleit.com/tng/getperso...

And here are more images Hálskirkjugarður við Hamarsfjörð, a beautiful place: www.legstadaleit.com/tng/showmap....

X sucks! Cancelled my account there. Don't want to support Musk!