Suzianna,
Boat trips around Mt Athos depart daily from Ormos Panagias in Sithonia.
You can either drive there, from Athitos, and get a ticket when you arrive there (more info here: [
www.halkidiki.com])
or ask your hotel to arrange that, as there are many buses coming from Kassandra to Ormos Panagias every day.
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Nikos
Forum Admin
nikos at halkidiki.com