The Sentinels

No one knows what the Sentinels are. No one has ever found them deliberately. The only people who have ever found them at all have been lost, wandering in the rain without the slightest idea of where they were. The Sentinels show no sign of noticing them. They just stand there, silent, standing in a row in the rain with their backs to the wind. Their cloaks are long and tattered.

Most people think they're watching for something. If so, it hasn't come yet.