From Dunedin, take the Northern Motorway to Waitati (19km). Turn right at Waitati, then next left and follow the road to Doctors Point (3km from motorway turnoff). The carpark is notorious for car break-ins.
Railway Cutting Crag - climb up the grassy slope to the railway line, which traverses the hill about 75m above the beach (10 mins walk).
The Arches Crag - walk east along the beach from the Doctors Point carpark. Most of the routes cross the delta-shaped slab 50m before you reach the Arches.