Oh! I don't feel I would have coped well with that tour (I am a little bit claustrophobic). I'd either be like the humming woman: come up with some sort of annoying tick to deal with the anxiety. Or, like you, imagine rats drawing during a flood, or ... a procession of 6 million souls returning to claim their bones back 😅
Last July my husband and I (together with family from Brazil) visited Évora's Capela do Ossos (bone chapel) - it's aprox. 3 hours from Lisbon.
I'd never seen anything quite like it before.
But, it was - by far - way less creepy than your skeleton tour!
The welcome message at the entrance goes something in the lines of:
We bones that here reside, for yours await. 😬
Thank you for another incredible tour @leaky20 :)