The town of Kórnik, 20km southeast of Poznań, is proof that mad German kings didn’t have a monopoly on eccentric castle design. Its unconventional castle was built by the powerful Górka family in the 15th century. Nowadays it’s more like a mansion than a castle; anyone who’s visited a stately home in the English countryside will experience déjà vu (it even has tasteful tea rooms outside the main gate).