The Wieliczka salt mine, about 10 miles from Krakow in southern Poland, is one of the world’s oldest and largest continually operating mines and a UNESCO World Heritage site.
The hollowed-out caverns left from digging for over 7 centuries have been transformed over the years into incredible attractions.
Over 45 million people have laid eyes on its great halls lit by salt chandeliers, chapels devoted to Polish saints, and walkways built around underground lakes.
The Mine is also home to the St Kinga’s Chapel, located over 330 feet underground and is one of the biggest attractions in the entire mine.
The chamber that contains the chapel is about 40 feet high, 60 feet wide and 180 feet long.
The mine hosts a number of events from weddings, to high-school proms, and school field trips.
The mine is so large that only 2% it is accessible to visitors.
Continuous mining stopped in 1996, although some miners are still at work today.
Their job nowadays is to protect the historic areas of the Mine, fill in post-mining voids in its non-historical parts, as well as manage fresh water leaks.
Watch the video below for a full tour and more history of the mine!