Bottled water does not have that aftertaste, if you are willing to pay for it. But it's not practical if you cook often.

[It's not a detail that would have concerned him, years ago. How he has changed.]

There are plenty of caves and forests for you to explore, if you miss sleeping surrounded by monsters. No underworld or accessible moon that I know of, but from most people's reactions it seems those are extremely uncommon in the first place.