Making a knowledge(Emergency Exits) check with History and any other appropriate skills:
Knowledge(Arcana) 1d20+7 : 8 + 7, total 15
Knowledge(Chronology) 1d20+7 : 20 + 7, total 27
Knowledge(History) 1d20+7 : 8 + 7, total 15
Knowledge(The Planes) 1d20+7 : 12 + 7, total 19