Gorges de l'Areuse, Switzerland The Val de Travers is a Jura mountain valley perpendicular to the main valleys (hence the name). The river Areuse has cut itself steeply through the soft limestone and clay sediments. It's one of those Roman bridges too.
Looking down the Inverted Tower or Initiation well of Quinta da Regaleira, Sintra, Portugal. The owner wanted to develop the palace and its grounds as a gathering of symbols that would reflect his interests and ideologies.