 The long Flat Bastion Road runs north-south from Devil's Gap Road and becomes Gardiner's Road before entering Europa Road, to The Llanito name for the road is "Cuesta de Mr. Bourne", and used to be known in Spanish as "" ().Located in a mainly wealthy residential area, the road contains some old government buildings.Of note is the Flat Bastion Magazine—now a geological research facility and exhibition centre that forms part of the Flat Bastion.