A modest Baroque manor house in the centre of the village, built in the eighteenth century by the Felsőbüki Nagy family — local nobility whose most famous member, Pál Felsőbüki Nagy, was a leading liberal politician in the Hungarian Reform Diet of the 1820s. The two-storey yellow building with its triangular pediment is preserved as a small local history museum.
The exhibits cover the family, the village, and the thermal-water discovery that transformed Bük. Hours are limited and irregular outside summer; the surrounding park, with old chestnuts and lindens, is freely accessible.