Natural archstone and Izvorul Manzului Waterfall and Cave. Located on a deep and hard-to-reach valley between Coronini and the Czech village Saint Helena, the Izvorul Manzului area is one of the most interesting places in the Danube Clisura. The area is strewn with waterfalls and dashes, with little waterholes or natural stone figures and populated by salamanders which, according to the old stories, if someone hears them call, they become deaf. Under the Isânoca Hill, it seems to be the lair of a dragon who has been sleeping for millennia and whoes movements during his deep  sleep change the shape of the hill.