St Mawes Castle 
“St Mawes Castle is among the best-preserved of Henry VIII's coastal artillery fortresses, and the most elaborately decorated of them all.…” – official site
Ease by public transport:
Unknown
“St Mawes Castle is among the best-preserved of Henry VIII's coastal artillery fortresses, and the most elaborately decorated of them all.…” – official site
Ease by public transport:
Unknown