The Caves are open daily from 8:30 am to 4:30 pm. The standard tour lasts about an hour. Visitors are invited to check on arrival with the booking office just inside the entrance, to find out when the next tour is set to begin. The maximum wait for a tour is 15 minutes, and sometimes there is no wait at all. Specific times for group bookings can be arranged by phone. Regular Crystal tours on the 1st Saturday of each month. By prior arrangement, for a minimum of 5 people, Crystal tours can be arranged for other days besides the 1st Saturday.