Sandown Fort is a fort built in Sandown

Sandown

Sandown is a seaside resort town and civil parish on the southeast coast of the Isle of Wight, England, neighbouring the town of Shanklin to the south. Sandown Bay is the name of the bay off the English Channel which both towns share, and it is notable for its long stretch of easily accessible...

 on the Isle of Wight

Isle of Wight

The Isle of Wight is a county and the largest island of England, located in the English Channel, on average about 2–4 miles off the south coast of the county of Hampshire, separated from the mainland by a strait called the Solent...

 in the middle of Sandown Bay

Sandown Bay

Sandown Bay is a broad bay which stretches for much of the length of the Isle of Wight's southeastern coast. It extends ten kilometres from Culver Cliff in the northeast to just south of Shanklin in the southwest. The towns of Shanklin and Sandown are located on the bay's coast.The seabed is a...

 108 feet above sea level. It is one of the many Palmerston Forts

Palmerston Forts

The Palmerston Forts are a group of forts and associated structures, around the coast of Britain.The forts were built during the Victorian period on the recommendations of the 1860 Royal Commission on the Defence of the United Kingdom, following concerns about the strength of the French Navy, and...

built on the island to protect it in response to a perceived French invasion. Construction of the fort began in April 1861 and was completed by September 1864 at a cost of £73,876. In later documents it is often referred to as Granite Fort.