Hop on a bus from Liberec to the village of Bozkov, where you’ll descend into the largest cave system in the region. This warren of subterranean chambers and tunnels stretches out for more than a kilometre and its stalagmites and stalactites resemble alien sculptures.
The caves were discovered just a few metres below the surface when a quarry was being blasted in 1947, and in recent years they have been declared a Czech national monument.
The main event here is the vast underground lake, with perfectly clear turquoise waters. Oh, and remember to wrap up warm when you visit: Temperatures never get above 8 °C down here.
