From Rethimno or Timbaki, leave the main road at Kissos, follow Vatos, and before Drimiskos, you'll mention those particular rocks.
Find the cache and enjoy the scenic view.
note: the title of this cache will sound strange to greek cachers, we just knew green is "prassino", and stone is "lithos"......a special occasion to laugh with tourists that we are ;-)
After that, don't forget to visit the Prevelli Monastery, Ammoudi beach, and the "palm beach".
Small note on cache maintenance: Jorusol has graciously offered to assist with maintenance. Thanks!