The visitors' centre closed in 2003 until recently however, the tours were restarted during 2013 with 2 to 3 tours running daily Monday to Friday at no cost to the visitors.
The visitors' centre closed in 2003. Recently however, the tours were restarted during 2013 with 2 to 3 tours. Recently however, the tours were running daily Monday to Friday at no cost to the visitors.