137-ft deep Romanian mine turned into theme park
A 137-feet deep Romanian salt mine has been turned into a theme park, which features rides including a boating lake, a Ferris wheel, an amphitheatre and a merry-go-round among other attractions. The Rudolf Salt Mine Park attracts around 600,000 visitors a year. The mine, which once served as a bomb-shelter, also features naturally elongating arrays of dangling stalactite formations.