We are aware that
The Dark Knight Rises plans on filming in Detroit and various other "unconfirmed" locations. Now, according to the Romania Insider it appears that some filming may take place in Bucharest.
The following is from romania-insider.com....
Bucharest Mayor Sorin Oprescu said the film’s producers and city officials met to discuss technical issues and director Christopher Nolan presented a list of shooting locations for a future project, such as Bucharest’s historical center and Edgar Quinet Street. People close to the matter said filming might also take place in the Palace of Parliament, as some members of the production team have visited a few of its rooms.
Nolan visited the Turda salt mines in northwestern Romania in December 2010. Turda Mayor said the visit was “unofficial” but involved “scouting” for a future project.