You won’t have many opportunities to see a saltwater lake more than hundred meters underground. In the Wieliczka Salt Mine near Krakow you have that possibility, but only for short time. It’s just that the guided tour doesn’t give you much time to have a look on the lake. The lights are turned on only when a group is present, apart from that the lake lies in almost total darkness.
The Wieliczka Salt Mine and especially the St. Kinga’s Chapel 101m below ground level are exceptional. A huge room (465m² and 11m high) so deep underground, enlightened by chandeliers and ornamented with numerous pieces of art. But the most impressive for me was the several hundred years old altar made from salt.
The Wieliczka Salt Mine must make it on your list when you have a rainy day in Cracow. The mine is simply mind-blowing. There are 300km full of statues, arts and chapels on 9 levels that were built over the last 700 years. It is the oldest salt mine of its kind in Europe and since 1978 legitimately among the first UNESCO World Heritage Sites.