It’s an abandoned fort built between 1850 and 1852 on a small island in the Milford Haven Waterway, Pembrokeshire, Wales.

May be an image of castle

It seems you are referring to Thorn Island Fort, an abandoned military fortification situated on a small island in the Milford Haven Waterway, Pembrokeshire, Wales. Thorn Island Fort was built between 1850 and 1852 as part of a network of coastal defenses during a period of heightened concerns about a potential invasion.

Key features of Thorn Island Fort include:

Historical Significance: Constructed during the Victorian era, Thorn Island Fort was part of a series of forts built to protect the strategic Milford Haven Waterway and the important Royal Naval Dockyard at Pembroke Dock from potential threats.Isolated Location: The fort is located on Thorn Island, a small island in the Milford Haven Waterway, providing it with a strategic position for defense. Its isolated location also adds to the unique charm of the site.Military Architecture: The fort is designed in a distinctive military architectural style of the 19th century, featuring gun emplacements, barracks, and other military structures.Abandonment: Over the years, as the strategic importance of coastal forts diminished, Thorn Island Fort was eventually decommissioned and abandoned. Today, it stands as a historical relic, offering a glimpse into the military history of the region.Accessible by Boat: Access to Thorn Island is typically by boat, adding to the sense of isolation and adventure for those who wish to explore the fort.

It’s worth noting that the state of Thorn Island Fort may change over time, and if you plan to visit or explore the area, it’s advisable to check for any local regulations or restrictions. The fort and its surroundings can be of interest to history enthusiasts, photographers, and those intrigued by abandoned historical sites.