Guided tours:

April 1st to October 31st	daily (Monday to Sunday)	non-stop 9 - 17 h
November 1st to März 31st	Monday to Friday	9 - 12 and 13 -15 h
	Saturday, Sunday and official holiday	9 - 15.30 h

You will have to wait max. 20 minutes for the start of a new tour.

The Seegrotte is open all year!