Built between 1643 and 1645 to defend Dartmouth against the Parliamentarians, it saw the fiercest action in 1646, when it came under attack from Roundhead forces under General Fairfax. The Royalists having already fled the town and the castle finally retreated to Gallants Bower where they soon surrendered.
Four years later the fort was dismantled. It is now one of the best preserved in the country and is a Scheduled and Listed Ancient Monument. It is looked after by The National Trust. 360 degree views across the estuary and inland.
Best to visit in late April to early May when the bluebells are out in abundance.