Makrigialos is a very nice place to visit the east of the Crete, this is not so crowded as in the north west.
There is nice beaches for snorkeling close to the House: paralia beach, diaskiry beach and the taverna is the best atmosphere we had in the evening in 14 days in Crete. Katos zakros is also a baie in the middle of nowhere, you can go by the death gorges or by car.
Paul is top for explanations and reactivity.