Although Vergina is not in or near Thessaloniki, you must not miss it if you have time to spare. Vergina is the site of excavated palace remains and tumulus tombs of the Macedonian kings and dignitaries. In fact, one of the tomb is believed to be that of Philip II, father of Alexander the great.
First, while still in Thessaloniki, you can start with a visit to the Archaeological Museum (6 M. Andronikou street) where you can see a superb collection of antiquities including gold from the Macedonian empire.
Then you can head to Vergina archaeological site (with museum on the premises), which is near the village of Imathia, 75 km away from Thessaloniki.
Believe me, the trip is more than worthy.
Fondest memory: Edessa is a town about 60Km from Thessaloniki. A trip to this town is worth it because of its natural beauty and especially of the water falls that exist in the center of the town. They are not Niagara Falls but still the water falls because of the earth's gravity.
Fondest memory: After a rating i got from Aspasoulitsa i thought it was i good idea to write about this small town about 70kms from Thessaloniki. It is a nice old city situated at the slope of a mountain. The most amazing thing about this town is its 'beach' as it is usually called. Nop, you can't swim there. Nop, it doesn't even have a sea. Yeap, it has a promenade. It's like walking by the seaside only that instead of the sea there is the valley of Veria. Also if you go towards the hospital of Veria, you will find the forest where you can have a pic-nic. Hey, Aspasoulitsa! Am i right on this or my memory fails me again?