Olt Defile

Olt Defile, defile in south-central Romania. The defile was cut into the Transylvanian Alps (Southern Carpathians) by the Olt River. It was particularly important during the Roman occupation (1st century bc to the 2nd century ad), when the Romans built a road and a line of fortifications along the Olt, north of its junction with the Danube River. The line of fortifications, known as the Limes Alutanus, for a time marked the eastern frontier of...