Here are Jason and Amy at the Pit Stop mat at Schoenbrunn Palace.
Unknown location of Jason and Amy
Obviously different attire in the two photos. But it is certainly possible that Jason and Amy could have changed quickly between the mat and the apparent confessional. That would only involve Jason changing shirts and possible Amy removing her T-shirt. The one thing that tends to make me think the unknown location is not in Austria is the difference in Amy's hair/make-up. The unknown location photo, to me, just screams of a pre-leg confessional/interview. Maybe it is in Vienna, Before heading to Abu Dhabi? The masonry in the upper left is interesting.