Sacred Art Sculpture in Poland

My parents recently visited Poland and I was fascinated to learn that in the salt mines (closed since 1992 due to flooding) there are sculptures of biblical scenes, a Madonna, chandeliers and even a chapel all carved by the workmen on their breaks from salt. The chapel is depicted above. I noted the tabernacle, 6 candles and altar rail. Mass is said in this underground chapel.

For more pictures go here.

And some general information on the salt mines here.