It was free in July. Why not call them to ask? You have to reserve ahead, you can't just walk in off the street, because the tours are timed. You can't just wander around by yourself, so when you call to reserve a tour time ask if the tickets are still free.
It was free this past June, not sure now
Yes and the purchase price varies depending on discounts. Range $10-$20 per person.
We went during the week and had no problem just going in. It was free and wonderful. Make sure to double check that both museums are open. We missed it by one day. That was a pity.
Very worthwhile to visit basement. Tickets not needed...just reservations
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