free entrance - closed today
21.6 - 11.7 1993
20.2 - 21.3 1993
13.1 - 7.2 1993
13.8 - 30.8 1992
28.3 - 10.5 1992
30.11 1991 - 19.1 1992
8.6 - 25.8 1991
9.2 - 1.4 1991
