Magnificent Marble Hall in Hatfield House, Hertfordshire, England, UK. With its wonderfully extravagant oak carving by John Bucke, Marble Hall remains much as Robert Cecil, the 1st Earl of Salisbury, built it in 1611. Sometimes used as a dining room, it is the place where the Salisburys would entertain their guests with lavish banquets, dances and masques.
I love the "outdoor room" aesthetic. You're apart of nature but you feel secure because you understand your sense of place. It may sound corny, but if I were an urban designer, I would have these faux-ruins in public parks. It may not be authentic, but it's certainly interesting