Ivan T. Sanderson had some interesting ideas about what might be beneath bodies of water of all kinds.
https://archive.org/details/invisible-re...-sanderson
Another Sanderson book, looks interesting.
https://archive.org/details/uninvited-vi...969_202407
Something to note about his works. They are -dated-, which in the case of unusual phenomena, I think is a good thing. They predate many of the dominant notions we encounter today on the internet.
Cheers
https://archive.org/details/invisible-re...-sanderson
Another Sanderson book, looks interesting.
https://archive.org/details/uninvited-vi...969_202407
Something to note about his works. They are -dated-, which in the case of unusual phenomena, I think is a good thing. They predate many of the dominant notions we encounter today on the internet.
Cheers
Fire In The Hole