The city of Girona, Spain has publicly released the information regarding which areas will be restricted during the filming of Game of Thrones, along with a map, and thus confirmed several locations for season 6.
The helpful pamphlet (conveyed to us by JuegoDeTronosTM) points out in dark yellow which Girona sites will be entirely restricted during shooting, and indicates with a dotted line the general area that may be affected by filming.