Metro Lines 1 or 2 are accessible and very convenient. There is no need to find the front door of the castle. There are doors in all directions. They can be directly entered. It is very convenient. The Castle does not need tickets and can enter or leave at will. The Museum in the castle is 5 euros a person, strongly recommended to buy, cost-effective. The castle itself is a museum, an exhibition room. If you have enough time, you can stay in it all day and savor the works of art.