Rising in the hills just north of San Marino, it flows east for only 25 miles before emptying into t
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)