A bigger discovery, Gaffney says, was a “bloody huge” pit about five yards in diameter at the eastern end of the Cursus. Today it lies buried at least three feet below the surface of the ground. Such a pit was much too large for a practical use—for instance, burying trash—because of the labor involved in digging it. In the archaeologists’ minds it could only have ritual implications, as “a marker of some kind,” Gaffney said. What’s more, if you drew a straight line between the pit and the heelstone at Stonehenge, it ran directly along the final section of the Avenue, on the path of the sunrise on the summer solstice.
“We thought, That’s a bit of a coincidence!” Gaffney recalled. “That was the point at which we thought, What’s at the other end? And there’s another pit! Two pits, marking the midsummer sunrise and the midsummer solstice, set within a monument that’s meant to be something to do with the passage of the sun.”
With his hands passing over the map, Gaffney showed how—on the longest days of the year—the pits formed a triangle with Stonehenge marking sunrise and sunset.
But what does that mean?