Bolingbroke Castle, Lincolnshire, England.

Bolingbroke Castle was one of three castles built by Ranulf de Blundeville, Earl of Chester and Lincoln, in the 1220s after his return from the Crusades (the others being Beeston Castle, Cheshire, and Chartley, Staffordshire). After Blundeville’s death, the castle remained in the ownership of the Earls of Lincoln and was later inherited through marriage by John of Gaunt, Duke of Lancaster.

During the English Civil War (1642–8), the castle became a defensible base for a Royalist garrison and was surrounded by armed Parliamentarian forces in 1643. The Royalists surrendered that winter, and the entire castle was destroyed. The remains of the castle gradually deteriorated and in 1815 the last remaining structure fell. The site was a bumpy field until archaeologists excavated the site in the 1960s and 1970s.

Today, the castle is managed by English Heritage, entry is free and it is open year round and is easily accessible from the road. There isn’t much parking as it is located in a small village.