It is the largest salt mine in Europe and it is located in Slanic, Prahova County, Romania, just 100 km north of Bucharest. The salt mine is closed for extraction, but it is open for visitors, featuring a microclimate with natural air-conditioning and constant temperature and atmospheric pressure throughout the year. The mine consists of 14 chambers with trapezoidal profiles, having a 10 m opening to the ceiling and 32 m to the ground, a height of 54 m and a wall inclination angle of 60 degrees.