The Invisible Dip On The Road Between Ardara and Glenties in County Donegal Admin at 11:26 am July 26, 2011 No cars. No cars at all.CAR!!!! How many more people must get freaked out before something is done about the invisible car dip on the way to the MacGill Summer School? Seriously. (Eamon Farrell/Photocall Ireland) FacebookTwitterPinterest