The closest activity to Doubia (Mainland Halkidiki) is Petralona Cave, 27.2 km away. Ordered by distance from Doubia. Info, prices, booking.
27.2 km from Doubia

28.1 km from Doubia

29.3 km from Doubia
30.4 km from Doubia

35.4 km from Doubia

35.4 km from Doubia

36.5 km from Doubia
Petralona Cave, just 27.2 km from Doubia. The rest are listed below, ordered by distance.
None sit within 15 km of Doubia 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 Doubia. A car makes exploring much easier — local buses and taxis are limited outside peak season.
Doubia 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.