Dartmouth Castle 
“Beautifully located fortresses on the edge of the river. For over 600 years Dartmouth Castle has guarded the Dart Estuary and the busy, vibrant port of Dartmouth.…” – official site
Ease by public transport:
Unknown
“Beautifully located fortresses on the edge of the river. For over 600 years Dartmouth Castle has guarded the Dart Estuary and the busy, vibrant port of Dartmouth.…” – official site
Ease by public transport:
Unknown