 However some applications have drawn criticism based on the potential costs involved.The Cairngorm Mountains, a massif at the heart of the Cairngorms National Park was on the 2006 Tentative List, but is no longer under active consideration.In April 2010 delegates of the THING project (which is supported by the EU's Northern Periphery Programme) explored the possibility of a transnational World Heritage nomination, based on an expansion of Iceland’s existing World Heritage Site Thingvellir.