Coalhouse Fort, in its attractive riverside park setting, has links with centuries of coastal defence. Completed in 1874 to defend the approaches to London from the perceived threat of a French invasion, the fort was also operational throughout the two world wars. It remains a fine example of Victorian military architecture being referred to as a Palmerston Fort. It is also considered to be one of the finest examples of an armoured casemated fort in the UK. Whilst undergoing restoration by 'The Coalhouse Fort Project', some areas remain open to the public. There are some beautiful coastal walks along the Estuary that are popular with dog walkers.