There is often interesting stuff inside a castle. This one (Vajdahunyad Castle, from Wikipedia) is pretty cool-looking both inside and out. This one even has everyone's friend Anonymous inside. It was built for the 1896 millenium celebrating 1000 years since Hungary become Hungary. It was built of paper and cardboard. The residents of Budapest liked it so much, though, that it was rebuilt of stone. It celebrates many of the architectural styles of Hungary.
I started noticing how unique Hungarian architecture seemed to be, shortly after we crossed the border from Croatia. The shapes of the roofs are different, and typically multifaceted, with towers and the like, even on relatively small country homes. More on Hungarian architecture later. @kapka