Halkidiki is the part of mainland Greece shaped like a three-fingered hand reaching into the Aegean, and each finger offers a different holiday. Kassandra, the first, is the polished one, home to Sani and the long shallow beaches and lagoon-side resorts that have made the region a byword for the family beach week done properly. Sithonia, the middle finger, is greener and quieter, all pine forest tumbling into hidden coves, with the sheltered shallows of Vourvourou ideal for a child's first snorkel. The water throughout is the clear, calm, gently shelving kind that lets parents relax their shoulders, and the whole peninsula sits close enough to Thessaloniki's airport that the transfer never eats into the first day.

Away from the sand there is more to do than the postcards suggest. Petralona Cave drips with stalactites and holds some of Europe's oldest human traces, Mount Holomontas threads forest hiking trails, and stone villages like Afitos and Nikiti hand over tavernas and markets at a human pace. The third finger, Athos, is a working monastic peninsula closed to casual visitors, but a boat tour along its coast gives families a look at the cliff-clinging monasteries without anyone needing special permission. The food is generous and easy, fresh seafood and mezze made for sharing, honey-glazed pastries to seal the deal. The hotels are a genuine strength, from large luxury beach resorts with serious kids' clubs and childcare to boutique hotels and family-run guesthouses, which is why Halkidiki has quietly become one of the most dependable family destinations in Greece.