There is a single fort out of many which was erected in the 1850s and 1860s. A great place to  visit with lots of history on view. Built between 1858-62 this is one of Palmerston's forts to defend Portsmouth. There are lots of things to explore, including exhibits, and is a great place to have a picnic too.Free entry.An amazing visit to a fascinating piece of Gosport history.This fort is surrounded by a lake with ducks and swans and a lot of big carp.