The stunning Alpine-inspired castle, which dates back to the 16th and 17th centuries, owes its current look to Christine of France, the wife of Victor Amadeus I (Duke of Savoy), who wanted to use it for pleasure purposes. Today, it belongs to the Architecture faculty of the Polytechnic University of Turin, and some parts of its garden are home to the Botanical Garden of the University of Turin, which you can also visit (from April to October). It offers free guided tours on Saturdays, for which you need to reserve your spot in advance.