February to April 
Tuesday to Sunday, 10 AM to 6 PM or 7 PM

May, June and September
Every day, 10 AM to 6 PM or 7 PM 

July and August
Every day, 10 AM to 7 PM 

October to December
Tuesday to Sunday, 10 AM to 6 PM or 7 PM

Open on holidays

Guides tour start times
Duration: 70 minutes
10 AM to 12 noon and 1 PM to 4:30 PM (5:30 PM in July and August and  weekends from April to June)
Tours leave approximately every 30/45 minutes.

Closed on
Mondays from 1 October to 30 April (except on holidays and for groups on reservation)

Closed from 18 December 2011 to 16 January 2012 (except for groups from 9 January).