A salt mine worked from the Middle Ages until 1932 and turned into a spectacular underground park: a Ferris wheel, a lake with rowing boats, an amphitheatre and salt walls 120 m below ground, near Cluj.
A lido with two salt lakes formed where old salt mines caved in, 24 km from Cluj-Napoca, plus an indoor pool of warm salt water that stays open all year.
A summer lido on two salt lakes formed in collapsed old salt pits, 100 m from the Durgău entrance of the Turda Salt Mine. The very salty water keeps you afloat; the mine is visited separately.