Tourists should seek permission from the authorities concerned before taking photographs of places of military importance, railway stations, bridges, airports, military installations, metro trains, tribal areas and sensitive border regions. It is prohibited to take photographs in some of the temples, historical monuments, forts, palaces, tombs and monasteries. Visitors are required to take special permits from the Archaeological Survey of India for photographing monuments with tripods and artificial lights. Camera fee is charged extra in some historical monuments.