Encircling the city, these walls remember much more than just the Venetians. Definitely visit if you're in the town.
Official website http://www.heraklion.gr/en/ourplace/new-venetian-walls/new-venetian-walls.html
Address 47 Λεωφόρος Νικολάου Πλαστήρα, Ηράκλειο 71201, Greece
Coordinates 35°19'58.599" N 25°7'51.005" E