The number one tourist spot in Budapest... for a good reason. Very interesting and the area around it is amazing!
Buda castle speaks for itself really. Amazing palace up on a hill the other side of the river to the main city. Cross over the bridge take the funicular up and enjoy the views. buda castle itself is not my favourite building in budapest but the whole buda area is great with some cool cafes and shops etc. very different vibe to pest side. peace.