My husband had heard about this place, and whilst I was a little skeptical about both seeing 6 million skeletons and getting up early, it was 100% worth both. So amazing, if a bit creepy, feels a world away from the rest of Paris. We got there on a Sunday morning at 9.10 and got in after 80 minutes. When we were going in at 10.20 (it opens at 10) the queue was all the way around the block and they only allow 200 down there at once.
So definitely try and get there around 9am. It's definitely worth a visit to see something so different.
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