Mumbles Battery - Credit: Wikimedia Commons
Mumbles Battery is a battery on the north coast of the Bristol Channel overlooking Swansea. It was built around the base of the Mumbles Lighthouse. It is one of the many Palmerston Forts built in response to a perceived French invasion, and was designed to protect Swansea Bay. Construction of the battery began in 1859 and was completed by 1861 at a cost of £8,760.Stevenson, Ian, 2000. The Bristol Channel and Swansea Defences, Redan:Journal of the Palmerston Forts Society, Gosport, pp28-50 Read more on Wikipedia
Source: en.wikipedia.org