Romania's largest natural bridge and the only one in the world carrying a public road: a 30 m limestone arch left standing after a cave roof collapsed, in the village of Ponoarele on the Mehedinți Plateau.
The DN57 runs about 100 km along the Danube from Orșova to Moldova Nouă, through the Great and Small Cauldrons, past the rock face of Decebalus, with Serbia on the far bank.
The narrowest stretch of the Danube Gorge, between Dubova and Ogradena: the river squeezes between limestone walls, with Serbia on the far bank, seen by boat or from Ciucaru Mare.
The face of the Dacian king Decebalus, carved between 1994 and 2004 into a 55 m rock at the mouth of the Mraconia, on the Romanian bank of the Danube: the tallest rock sculpture in Europe.