The castle was built by Henry III in about 1250. By 1787, cottages had been built round the small courtyard inside the Keep. Castle Keep East has fine views.

This very clever scale model of a French chateau sits on a hill above the River Trent in the middle of the Lincolnshire countryside.

Houghton West Lodge is one of four houses that guard the approaches to Houghton Hall,  one of England’s finest Palladian houses and once home to Britain's first Prime Minister.

The tower was built as a folly in 1821 with a pretty sitting room on the first floor. The third floor was added in 1943 by the Germans as an observation point, with views in every direction.

Old School, long known as 'the Blue Bung', is the island’s former Sunday school. It is a small building with a snug interior. A stay here never feels quite long enough.

The Pigsty’s classical design was supposedly inspired by Squire Barry’s travels around the Mediterranean in the 1880s and offers striking views of Robin Hood’s Bay.

A tiny, circular tower standing on the boundary of a cricket pitch, Prospect Tower was built around 1808. Approached along an avenue of walnut trees, Lord Harris called it his “whim.”

The Summerhouse stands in beautiful woodland on the Shuttleworth Estate. The outstandingly fine brickwork of this foursquare folly is likely to date from the early 18th century.

A Georgian folly within an outstanding Picturesque garden, the Ruin was built in about 1766. On the edge of a steep wooded gorge, it was one of several buildings scattered across the gardens.

This simple and evocative cottage, from around 1840, was built to serve one of the monumental pumping engines that sprang up as the Steam Age took on the challenge of draining the Fenland.

This tiny pavilion was a majestic grandstand for the enclosure in front. It is a mature expression in miniature of all that was best in Tudor and Jacobean architecture.

Ty Uchaf means ‘the top’ or ‘highest’ house. It sits at the head of a valley above Betws-y-Coed. A datestone for 1685 was found in the tumbledown pigsty.

Whiteford Temple is an ornamental granite folly with views towards the Tamar Estuary. It was built in the 18th century for Sir John Call, a military engineer who had made a fortune in India.

At the top of the hamlet of Coombe, Mill House overlooks the bubbling stream.

This eighteenth-century Gothic summerhouse sits beside the River Esk near Carlisle. Remote and peaceful, the three large windows in the main room give striking views over the river.