The most prominent hill is Mither Tap (1698 feet high), which is topped by a stone fort. The fort is fully 700 feet in circumference, and the walls encircling the summit are 15 feet thick in places.
Bennachie has been eulogized by numerous poets, including Charles Murray, author of Hamewith. The hills are best accessed from minor roads near Glenton, to the south of the hills, or to the east, from the road south of Chapel of Garioch.
There are several prehistoric monuments close to Bennachie, including the 'Maiden Stone', Easter Aquhorthies Stone Circle, and the Brandsbutt Symbol Stone. Four miles away is Monymusk church, a 12th-century church with remains of an Augustinian monastery.