Vranov dam, Vranov nad Dyjí, Czech Republic 

Vranov dam abelongs to the warmest water reservoirs in the Czech Republic. Water temperature often enables to bathe as early as at the beginning of June and summer season ends as late as in the middle of September. Water quality in the dam has been rated as a very good one for years. Gradual access into water and sandy beach is very suitable for small children as well. Sporty holidaymakers will appreciate volleyball ground, table tennis, waterslide, rental of boats, pedal boats and sport equipment. There are also very favourable conditions for water sport lovers (for example windsurfing and yachting).

http://www.vranovskaprehrada.cz/eng/Main2.htm