A thousand years of history, laid out so you can see what was happening everywhere at once. Three ways in. Same world underneath.
Fall through time. Scroll fast and a thousand years goes by in a second. Slow down and the rings split into centuries, then decades, then years.
Move left and right through the centuries with whichever parts of the world you want side by side. Click anything and the deeper layers grow in behind it.
A field of drifting points, every one of them joined to something. Touch one and watch what it made possible travel outward, years at a time.