Saumur is located at the confluence of the Loire and Thouet rivers in the Loire Valley. The region is known for producing world-renowned wines, and also produces mushrooms in an interesting underground process viewable to the public. Saumur is home to the Château de Saumur, which was built in the 10th century and passed through the hands of Henry II of England, Philip II of France, King Henri IV (of France and Navarre), and Napoleon Bonaparte. Another interesting attraction is the Museé des Blindes, with over 850 tanks on display. The Louis de Grenelle wine cellars are particularly popular with tourists for learning about the wine-making process and the wine of the region and, of course, for tastings. An unusual attraction in Saumur is the Pierre et Lumiere, which displays the miniature carvings of famous Loire chateaux, towns and churches, carved out of tufa stone in natural caves. The Cadre Noir, a riding academy which has been operating for nearly 150 years, is a haven for horse lovers, and they put on remarkable shows and give guided tours of their stables. Saumur is located in easy distance of Paris, Nantes, Angers, Tours, and several other cities, making it an ideal day trip.