The caves in Maastricht are truly fascinating. Pieter, our tour guide, was an excellent storyteller.
Some of the people in our group had baby carriages, so accessibility isn't really an issue. Pieter took them along a route without stairs.
The cons are that the group size felt much too large and the length felt far too short. I could have spent much longer exploring and will hopefully be back to do so on a private tour one day.
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