
1) Impact crater on Mars
Found on
https://www.crosswordclues.com/clue/sarno
[river] The Sarno, known as Sarnus to the Romans, is a stream that passes through Pompeii to the south of the Italian city of Naples. It is considered the most polluted river in Europe. as the result of industrial waste. It flows about 24 km (38.6 miles) from the base of Mt. Sarno to the Bay of Naples collecting water from the Solofrana and...
Found on
http://en.wikipedia.org/wiki/Sarno_(river)

town, Campania regione, southern Italy, at the foot of Saretto hill near the sources of the Sarno (ancient Sarnus) River, just northwest of Salerno. ...
Found on
http://www.britannica.com/eb/a-z/s/32
No exact match found.