Thecastlehunter brings us this aerial video of a well known castle ruins near London, England. It's called Hadleigh Castle, and it's located on the Thames Estuary in County Essex just east of the United Kingdom's capital city. The castle was built for King Henry III in the early 13th century and later significantly expanded and remodeled by King Edward III. The propery fell into disuse after that, coming under ownership of the Ministry of Works after World War II. Today, it's an English Heritage site.