Torsty's Churn

The heses churn was just past the trees, in the middle of a large hollow. It was a gaping hole in the rock 15 feet in diameter. After a ten foot drop, bottomless, dark water lapped at the spiral grooved walls. A stream of melt water from a glacier had drilled it into the granite by rotating gravel millions of years ago. If you threw a rock into the spiraing grooves in just the right way, alien machines activated and opened a worm hole to wherever in space and time you wanted to go. The vast depths looked back like the entire island was a monstrous eye, and the churn its pupil inhuman and black and fathomless like death itself