Rising in the hills just north of San Marino, it flows east for only 25 miles before emptying into the  Adriatic.
Rising in the hills just north of San Marino, it flows east for only 25 miles before emptying into the  Adriatic. Although it passes by no significant towns or landmarks, a famous cliche--and the fact that it  once served as the boundary between Rome and Gaul--have combined to make it one of the most familiar  place-names in Europe. FTP, name this small river crossed literally by Caesar in 49 B.C., and figuratively  by any risk-taker since.
Rising in the hills just north of San Marino, it flows east for only 25 miles before emptying into the  Adriatic.
The Rubicon (Rubicone)