It is certainly worth visiting. Building started in the 15th century and a whole new north range added by the then laird, Patrick Maxwell, this was completed in 1597. In this photograph you can see his initials and the date above the doorway and the motto
"The blissings of God be heirein".
My favourite part of Newark Castle is the doo'cot. It is all that remains of a defensive wall that would have run around the original keep. You can just about see where the wall would have been on either side of the structure.
Newark Castle, Port Glasgow is cared for by Historic Scotland.
