Civilization quickly passes as I leave Myitkyina behind me, and save for the solitary gold panner digging into a sandbar, I have the spread of river and sky to myself.
A treacherous 12-mile-long sandbar called Diamond Shoals lies just off the coast, conspiring with powerful ocean currents to pull ships to their demise.
The waves interact with the geometry, and then create turbulence and start to accumulate the sand so the sand starts to form these sandbars on their own.