Richborough Castle is a Roman Saxon Shore fort better known as Richborough Roman Fort. It is situated in Richborough near Sandwich, Kent. Substantial remains of the massive fort walls still stand to a height of several metres.
It is part of a larger Roman town called Rutupiae or Portus Ritupis that developed around the fort and the associated port. The settlement was founded after the Roman conquest of Britain in AD 43. Because of its position near to a large natural harbour in the Wantsum Channel and to the mouth of the Stour, Rutupiae served as a main gateway to Roman Britain and the starting point for the road now known as Watling Street. The site is now 2+1⁄2 miles inland from the current coastline.
Wikipedia https://en.wikipedia.org/wiki/Richborough_Castle
Address CT13 9, United Kingdom
Coordinates 51°17'32.674" N 1°19'55.312" E