Last weekend's One Clue Mystery was of the Fortaleza da Guincho Hotel hotel in Portugal. It sits on the most westerly tip of Europe, facing the Atlantic Ocean. The photo was recognized by George G.
The hotel was originally built as a fort in the 17th century. Today it has been repurposed as a 5 star hotel with a Michelin starred restaurant.
The above photo is of the Guincho Beach next to Fortaleza da Guincho Hotel.