Well I don't speak French so I am not certain. I am going by this website and Google translator.
http://www.revesdecimes.fr/
The last page is the operating hours and when I type it in Google translator it says that from May 3 to June 18 it is open on Saturdays, Sundays and public holidays from 10:00 to 6:00. Several months ago I tried to contact by e-mail but got no response. Of course they weren't operating at that time of the year and I e-mailed in English. If any of our French speaking cruisers could confirm that would be great. Lots of great pictures on their website and a few videos on
youtube but again all in French and from 2007 and 2008 so can't guarantee it is open.
Two cruise operators are selling excursions from Ajaccio to somewhere so one must still exist. I figure our choices are a few Napoleon sites, mountains or beaches. Living in Hawaii we can go to the beach 365 days a year so mountains it is.