Downton Abbey was filmed in London in the United Kingdom.
Halton House
In movie
Real
West Wittering Beach
In movie
Real
Lancaster House
In movie
Real
Scene was shot Lancaster House is a neo-classical mansion constructed in 1825 for the Duke of York and Albany designed partially by Sir Robert Smirke before he was replaced by Benjamin Dean Wyatt. The interior wasn't completed until 1840 with the help of a third architect Sir Charles Barry. The house has become a popular stand-in for Buckingham Palace in films and TV playing that role half a dozen times.
London