The Salt Mine in Wieliczka is an UNESCO World Heritage Site and is located close to Krakow. It was one of the world's oldest operating salt mines. It reaches down to a depth of 327 meters and is over 300 km long. To enter the mine visitors have to descend the stairs with 380 steps. Going up is more easy, here you can use the lift that brings you back up from a depth of 135 m. The walk in the salt mine is 3,5 km long and will show you chapels cut in salt, underground lakes and many sculptures from salt. The salt mine is a must see when you are in Krakow.