[shellfishgene]

Also reminds me of Ra Paulette who dug out elaborately decorated caves in soft rock for decades. Nice documentary: https://www.youtube.com/watch?v=9n_bHcZaGJs

[stevekemp]

That reminds me of the Shell Grotto, in the UK:

https://en.wikipedia.org/wiki/Shell_Grotto,_Margate

This video makes the scale more apparent (and impressive)

https://www.youtube.com/watch?v=XGvxLuIIfdM