The Cathedral is open from Monday to Friday from 8:00 AM to 6:45 PM, and from 8:00 AM to 7:15 PM on Saturday and Sunday.
The Treasury is open from 9:30 AM to 6:00 PM on weekdays, 9:30 AM to 6:30 PM on Saturday, and 1:30 PM to 6:30 PM on Sunday.
The towers are open from 10:00 AM to 6:30 PM between April 1st and September 30th. From October 1st to March 31st, the tower is open from 10:00 AM to 5:30 PM.
The crypt is open from 10:00 AM to 6:00 PM from Tuesday to Sunday.
You can find Notre Dame on the eastern half of ILE DE LA CITE in the fourth arrondissement.
Take the metro line 4 to Saint-Michel station and walk to the Notre Dame which is only a short distance from the statio.
Alternatively, you can also take RER Line B and C to the Saint Michel Notre Dame.
You are expected to respect the cleanliness of the monument and not vandalise any part of the Notre Dame. Strict legal action can be taken against anyone who litters or vandalises the site.