While I explore as much as possible, I find myself regularly missing the little spots I'm supposed to go, like that valley section after the Ashina Outskirts, I didn't see it till I looked up where I was supposed to go next and felt real dumb for not looking over that cliff edge next to the idol, or that I feel like I'm currently missing something in Senpou Temple. I found the Demon Bell spot, that place to the Headless, and I made it up to the Main Hall and got the letter from the priest, but I don't see a boss to fight or another direction to go as the one tunnel path just goes to a new fighting style. Still gotta beat Lady Butterfly, need to beat that asshole gun guy at the Sunken Valley, and there's at least 2 Headless I need to try and take out eventually.