Nine cave systems, ten military sites, seventeen mines and tunnels and countless storehouses, cellars, dungeons and tunnels, the list of underground wonders in Poland is endless. It includes some wonders on a European scale like the Neolithic mines in Krzemionki Opatowskie or the royal salt mine in Wieliczka that is under the protection of UNESCO.
The tunnels at Kowary have been adapted as an inhalation centre for Radon therapy and the salt mine in Bochnia has a restaurant, a basketball court and a chapel where weddings are held regularly. The Staszic Chamber at Wieliczka is used by balloonists, the cellars beneath the Market Square in Krakow have been taken over by restaurateurs and the beautiful crypts designed by Lindley at the Department of Slow Filters in the Warsaw Filtration Station that has supplied the capital’s clean water for more than 120 years.
