The Underground Salt Cathedral Of Poland

Wieliczka salt mine, near Krakow, Poland, shows that salt can be an art material too! The mine was first opened in the 13th century, and today, it’s a part of the First UNESCO World Heritage List. And for a good reason! The salt mine, which reaches -327 meters at its deepest point, features underground lakes, 2,000 chambers, and chapels equipped with enormous chandeliers.