It's worth going to Brno in the Czech Republic just to see the Villa Tugendhat. One of Mies van der Rohe's iconic buildings, it is now fully restored to its former glory after many years of neglect and mistreatement after its original owners fled to Switzerland in 1938. The big open plan room on the middle floor is worth the price of admission on its own, with its pale floor-to-ceiling onyx wall, its curved dining room wall in sumptuous wood, the tubular steel chairs designed by Mies himself in contrasting green and red, the enormous dining room table set on a single polished steel pillar and the huge glass windows that retract into the floor at the touch of the button, uniting the inside of the house with the lovely garden. The view over the city is glorious, too.
Make sure to book at least a month in advance as tickets are snapped up quickly, and try to arrive early to stroll around the neighbourhood and admire the Art Nouveau villas that are such a contrast to the spare elegance of the Villa Tugendhat.