In promoting transnational regional development, the European Commission de
signated the 'Atlantic Arc' as one of eight 'Euroregions' in its Europe 200
0 reports. This article critically examines this 'Arc' concept and assesses
the degree to which it is being transformed into reality. It then draws im
plications for builders of other potential transnational regions within the
EU. While the Atlantic Are Commission has promoted a range of cross-border
activities, commitment to it varies greatly and the projects undertaken re
main limited ill scale. Therefore, it is too soon to judge whether it is ge
nerating durable transnational 'bottom-up' development, or merely pursuing
a regional mirage.