London, England - Tower of London - Ships on River - Tower in Background.. Part of Box 23 Boswell Collection. A Day trip to London.Her Majesty's Royal Palace and Fortress, more commonly known as the Tower of London, is a historic castle on the north bank of the River Thames in central London. It lies within the London Borough of Tower Hamlets, separated from the eastern edge of the square mile of the City of London by the open space known as Tower Hill.