The closest activity to Arnaia (Mainland Halkidiki) is Ancient Stagira, 20.0 km away. Ordered by distance from Arnaia. Info, prices, booking.
20.0 km from Arnaia
29.5 km from Arnaia

30.5 km from Arnaia
38.3 km from Arnaia

38.3 km from Arnaia

38.5 km from Arnaia

39.0 km from Arnaia

Ancient Stagira, just 20.0 km from Arnaia. The rest are listed below, ordered by distance.
None sit within 15 km of Arnaia itself, but Mainland Halkidiki has 7 activities in total — listed below, closest first.
Based on user reviews: Folklore Museum of Nea Moudania (★4.8), Fishing Boats & Tools Museum (★4.7), Wine Tasting (★4.6).
The activities are spread out around Arnaia. A car makes exploring much easier — local buses and taxis are limited outside peak season.
Arnaia is on the Mainland Halkidiki side of Halkidiki, in northern Greece. The nearest airport is Thessaloniki (SKG); from there a car is the most convenient way to reach the Mainland Halkidiki villages.