Well, there are many strange things here, not the least the fact that he's here - still without knowing how and why. So Law makes a gesture as if he was shrugging, which might look weird seeing as he only has one arm now, but maybe he's just not used to that fact yet.

"Here, or in my 'world'? If it's here, then maybe this strange huge tree. It's still quite alive, even though it doesn't look it. And I don't know what sort of ritual is connected to it, but they seem to worship it. Just a moment ago, somebody wanted me to give it offerings."

Looking at her carefully, he asks "You didn't happen to arrive here on your own?"