This is one of the largest royal residences in the world, La Venaria Reale, comparable in size to Versailles. This huge complex includes the baroque Royal Palace and gardens as well as the 3000 hectare of La Mandria Park. The palace was commissioned for Duke Charles Emmanuel II, as a base for his hunting expeditions. La Venaria Reale opened to the public in 2007, following the largest restoration program in Europe. Both the palace and park are UNESCO World Heritage Sites. 
This extravagant baroque Royal Palace was used as a Savoy residence in the 17th to 18th centuries and is one of the most significant examples of baroque art and architecture in existence and is considered one of the most beautiful royal residences in Europe.
The entire surrounding village of Venaria and the Duke’s hunting grounds were reshaped to incorporate the palace and its many annexes so that they all flowed together into one monumental site.
The garden was completely destroyed in the 19th century but etchings and drawings of the original garden were used in creating the new garden. The new garden has the same lines and proportions as the old garden but has a more contemporary style.
In addition to touring the palace, there are exhibitions available to visit, both permanent and temporary. 
In keeping with providing a restaurant recommendation for your day trip, there is a very special restaurant contained within the Palace. Dolce Stil Novo is the restaurant of Alfredo Russo, and is considered one of Italy’s most renowned restaurants. It opened in 2008 and although I can’t personally recommend it (yet) the unique setting would be a great venue to celebrate a special event.
Entrance into the Palace and gardens is €14 and they are open Tues-Sunday. At La Venaria Reale you will loose yourself in nature, history and the arts, it’s located just 10km from Turin city center, or about 50min by car from TorreBarolo.
