The Municipal District of Mírthios includes the settlements of Mírthios, Calypso, Campos, Kokkina Horafia, Plakias and Phoenix. Mírthios is 36 kilometers from Rethymnon and has beautiful views over the bay of Plakias and the Libyan Sea. It is the birthplace of the great linguist George Hadjidakis. It is the second largest municipal district with 536 inhabitants according to the census of 2001 and features a traditional settlement. According to the tradition, the name of the village comes from the word “myrtia” (myrtle) because once in the center of the village there was a huge myrtle which currently does not exist. The locals are not all genuine Cretans.
Many came mainly from Greece, but there are settlers from Sfakia and other parts of Crete. Buccaneers came to live in the village. Especially, at the beach called Paligremnos, large squids come out in the sand which residents gather with long rods. To Myrthio belongs half of the canyon of Kotsifou (the other half belongs to Selia).
The canyon is located west of the mountain Kouroupa and it is the extension of the peak Kryoneritis.
One of the many springs of the gorge is named Mary Kolympa. In Nioschorio, there was a small monastery ran by Preveli monastery.