The Natural Explorer trait from the UA Revised Ranger provides the following benefit (among others) when traveling for an hour or more:
Your group can't become lost except by magical means.
The PHB version of the feature provides the same benefit but only while in the ranger's favored terrain.
Does this mean that if I leave a stick in the woods, I can't fail to get back to the spot where I left it? Or does it mean I can vaguely keep on the correct path in order to find the village on the other side of that forest? Or something in between?
I can't see any rules either way, so as far as I can tell this is up to DM interpretation, but I am curious if there is anything missing (Possibly as part of another trait or spell) that will provide clarification.
Best Answer
What the Ranger feature talks about is also mentioned in the Navigate activity from p. 183 in the PHB:
The mentioned rules are in p. 111 from the DMG, under "Becoming Lost" section. I'm not sure I can paste the whole section here (copyright and all), but the relevant parts:
It then describes the test, the DC and all that stuff.
So, essentially, having the Ranger in the party means you don't have to make this check, ever, because you can't get lost (i.e. you always succeed on this check).
As request by the asker, what does count as a destination? - first, it's not a game-defined word, so it just uses the common dictionary meaning.
Any place that fits this descriptions works. The example given - 'the tree I buried the treasure under' - surely counts as a destination in my interpretation. It's ultimately up to the DM, though.