Undetectable shrines in Zelda BotW that are not heroic missions

zelda-breath-of-the-wild

I'm trying to find all shrines in Zelda BotW and I was wondering if there is any shrine that is both unable to be detected by the Sheika sensor and is not a Heroic quest. I'm referring, for instance, to Tho Kayu Shrine, which is not part of any quest but only appears after you kill the Moldora and light four torches.

Best Answer

Saas Ko'sah Shrine qualify I think. I'm not aware of any quest for it, although if I remember correcly, there's a character that give a hint about it in a stable.

It is located

in Hyrule Castle, dock access

and can be found by

lighting the big brazier on the upper platform.