Slănic mine is an old salt mine, located in Slănic, Prahova County, Romania, 100 km north of Bucharest. The salt mine is closed for extraction purposes, but is open for visitors, featuring a microclimate with natural air-conditioning and constant temperature and atmospheric pressure throughout the year. It is made up of two levels, named Unirea and Mihai. Many of the visitors come for its supposed healing effects due to the purity of the air. Throughout the mine you will find various types of equipment for recreational activity such as playground equipment and some ping-pong tables. One area is sectioned off and is used for medical patients with lung cancer to come and rest in. The main elevator shaft is unique in that it has no metallic parts due to rust. After an elevator accident in 2014, minivans are used to spiral visitors up and down.