This is a must do! Someone decided to "Marie Kondo" all the bones... and there are a lot of bones, like 6 million of them. The audio guide is helpful. Get your tickets online beforehand to avoid the queue.
Get the "skip the line" passes online and you will save yourself literally hours waiting in line. It's only a few dollars more to add the audio tour, which I recommend as well. Absolutely worth doing.
one of the coolest and unusual things to do in paris .. and one of my favorites
get here EARLY! the line is long .. they open at 10, and both times ive been we got in line at 915/930 .. but well worth it!