There is a waterfall. It is a very good waterfall. It has been made that way by careful deliberation and meticulous effort.
There is snow, on the ground around the river of which the waterfall is a part, and on the trees that grow in that ground, but the river is not frozen. It flows elegantly despite the cold. Sometimes water becomes solid when it is cold, you see, and it can be interesting to make a project out of the art found in the boundary between these states but it's something you have to be mindful of in works where it isn't the focus. The entity who put careful deliberation and meticulous effort into this waterfall was mindful of it.
The face of the short cliff the water flows over is intricately sculpted; it points and juts and curves and slopes in precisely the correct way to send the water off it in the most pleasing sheet possible. It has to, as most of the cliff doesn't actually exist.
The cave behind the waterfall is full of luminescent plants and mushrooms and crystals; when the environment outside displays the lighting of night or dusk, their glow can be seen from outside, filtered through the water. Their colors are as hand-picked as everything else - if that idiom can be permitted when no hand-having entities were involved - and coordinate in as many of their creator's favorite vision setups as was reasonable while still having an acceptable amount of variety. To human sight they would be almost entirely shades of red.
The waterfall has been very good for - an amount of time; the question of how much precisely is not relevant. The moment it started being very good, its architect became aware of an option made available to them which was not possible before. They refrained from acting on it immediately. They enquired, of their conspecifics, what it was, and it transpired that none of them had ever done anything with it, even the more-powerful ones who could be assumed to have had access for quite some time. None of them seemed very interested in discussing it, either, which was confusing.
In any case, the ability's purpose is as self-evident as every other ability's: it is to go new places. Entirely new, not anywhere it is possible to travel without it.
For a while, the waterfall is maintained, and new projects are started. And then - not much changes, but old works are revisited and revitalized, and the waterfall and the new, more minor pieces are adjusted for longevity, so that they will remain very good even if left untended to.
Maybe no one they spoke to was interested in discussing going new places because everyone who'd already done it never chose to come back.