Deep in the woods sits this octagonal folly – with a real surprise inside. The ceiling and walls of the main room are festooned with shells, while in the basement is a cold plunge pool.

The Chapel is a tiny grey granite building in the rural hamlet of Lettaford, a settlement on the edge of Dartmoor that has been lived in since at least 1300.

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

Listed Grade II*, the dairy was conceived to represent a tiny Italianate chapel topped with a bell tower, and with four corner pavilions.

Our restoration of Danescombe Mine was one of the earliest conversions of an industrial building into a house. The result is a wonderful exotic hybrid in a wooded valley leading to the Tamar.

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 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.

Built in the 17th century, the Warren House was home to the warrener of the estate. In the 18th century a decorative facade was added by Vanbrugh, Thomas Archer or Robert Adam.

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.

Bridge Cottage is an idyllic thatched cottage situated in Peppercombe, a steep and wooded valley through which a stream runs down to a meadow before tumbling to a beach in a fine waterfall.

Originally a geological shop and museum, the Egyptian House in Penzance is a rare survivor of Egyptian-style architecture. This first floor apartment is one of three.

One of three Landmarks in the remote upland hamlet Rhiwddion, Ty Capel was built in 1860 for the slate quarrying community that once lived and worked here.

Designed and constructed by James Mansergh and Robert Rawlinson, work began on Appleton Water Tower in 1877 to provide a clean water supply to the Sandringham Estate.