Berkeley Square is a well-known garden square in the West End of London, famous for its historic buildings and large London Plane trees planted in 1789. Originally designed by architect William Kent in the mid-18th century, the square is surrounded by grand townhouses that have been converted into offices for businesses like hedge funds and wealth management firms. With notable residents including Winston Churchill and George Canning, Berkeley Square also has a reputation for being haunted, adding a touch of mystery to its elegant surroundings.