10 years ago we installed lighting system in the Great Dom hall in Balcarka Cave in Czech Republic. Also analog light + music show was programmed there. Two weeks ago we visited this cave... https://t.co/gNjQrT2kQY
Few weeks ago visited show mine Christiane in Diemelsee. 1,5 km of galleries and huge rooms. Lot of different minerals also flowing stones. - cool hier: Grube Christiane https://t.co/fzv1MNRUnT