Living in Crete: Heraklion close to Koules Fortress

A quick run down of my exact location in Crete.
I live in the town of Heraklion in Crete which is almost in the middle of the island on the north coast. To the east are the towns of Malia, some of the younger ilke might be familiar with this destination, Malia is about a 40 minute drive from Heraklio. About half way between them is the small town of Hersonisos, not quite as lively but similar to Malia, plenty of beach hotels and tourist bars, not far from another favoured tourist destination; Gouves. To the west, an hours drive, is Rethymno, the third biggest town on the island and arguably the nicest of the large towns in Crete. Heraklio is a working town, shall we say, it has a very large working port, mainly for ferries and cruise liners servicing the Mediterranean, although there is still a small fleet of fishing boats.
There is a fair tourist trade, mostly German and Dutch, but I’m told the fastest growing sector is the Russians. The centre offers a few little gems for the tourists. Amongst some of the main attractions are Koules Fortress in the harbour, Heraklion Archaeological Museum and many churches including; Agios Minas, St. Marks Basilica and St. Catherine church.
My flat is located two roads from the harbour in a really nice little square literally two minutes walk from all these attractions, lucky me. Still haven’t been to any of them yet, I’m saving them for when I get some visitors. Anyone?