This is Fishguard fort,and we went to go visit it,here is the story behind Fishguard fort:Fishguard Fort, also known as Fishguard Blockhouse, is a historic fortification located in Fishguard, Wales. It was built in 1781 as a response to the threat of invasion during the American Revolutionary War. The fort played a significant role during the last invasion of Britain in 1797 when a French force landed at nearby Carregwastad Head. The fort's defenders, along with local militia and British regulars, repelled the invasion in what became known as the "Last Invasion of Britain." Today, Fishguard Fort stands as a reminder of this historic event and is open to visitors interested in exploring its history.