Upnor Castle, Upnor

Upnor Castle is a remarkable survivor of Tudor military architecture, built in 1567 to defend the Medway against Spanish attack and to protect the expanding naval dockyard at Chatham. The castle exemplifies the shift from medieval to early modern fortification design, featuring low angular bastions designed to mount cannon rather than the high walls of older keeps. Standing on a narrow peninsula jutting into the Medway, the castle commanded the principal waterway approach to the dockyards and London itself.

Today, the castle functions as a museum where visitors can explore its compact but ingeniously designed interior, including gun emplacements, officers' quarters, and exhibition spaces explaining the 16th and 17th-century naval arms race. The site offers excellent views down the Medway estuary, and the surrounding foreshore and gardens provide pleasant walking opportunities. The castle's riverside setting makes it particularly atmospheric, especially at high tide when water laps against its walls.

Upnor Castle represents a pivotal moment in English naval and military history, embodying both technological innovation and strategic vulnerability. Its accessible location on the 173 route, combined with its compact scale and rich interpretive content, makes it an essential stop for anyone interested in Tudor military engineering or the Medway's role in English maritime power.