In the real world, Shell Cottage was a temporary film set erected in the sand dunes of Freshwater West in Pembrokeshire, Wales. In another world, it was something special.
Described in the book as a “lonely and beautiful place”, Shell Cottage was the home of Bill Weasley and Fleur Delacour and served as a safe house for the Weasley family and allies of the Order of the Phoenix.
After the filming of Harry Potter and the Deathly Hallows, the cottage was demolished, and the public was never granted access. But you can see it as it was, including the interior, at Urban Ghosts. Link
(Image credit: Flickr user Ade Owens)