Mancora - is a beachtown in the 1165 km of the Panamericana. Eppo (http://eppo.com.pe) buses will take you there in 15 minutes for 1,50 soles.
Cabo Blanco - Ernest Hemingway used to go to this beach to fish the Merlin. According to the locals, this beach inspired him to write "The old man and the sea".