Château d'Olhain
Fortress · Fresnicourt-le-Dolmen
Botanical garden
arboretum d'Olhain
The Arboretum d'Olhain is a 2 hectare arboretum located in the Forêt Domaniale d'Olhain near Olhain, Fresnicourt-le-Dolmen, Pas-de-Calais, Nord-Pas-de-Calais, France. It is open daily without charge.