The mysterious Aberlemno stones are among Scotland's finest Pictish carved stones. By the roadside there are three 7th- to 9th-century slabs with various symbols, including the z-rod and double disc; in the churchyard at the bottom of the hill there's a magnificent 8th-century stone displaying a Celtic cross, interlace decoration, entwined beasts and, on the reverse, scenes of the Battle of Nechtansmere (where the Picts vanquished the Northumbrians in 685). The site is 5 miles northeast of Forfar, on the B9134.
The stones are covered up from October to March, otherwise there's free access at all times.