“We don’t think it was a ‘habitat’ site,” said the stocky, bespectacled Mr. Stone. “Perhaps a shaman once stayed here, but primarily it’s a religious and astronomical site, a gathering place, like Stonehenge in England.”
The main site is a half-mile past the gift shop at the top of a small round hill. On the path leading up through a stand of ragged oak trees I’d arranged to meet Alan Hill, 68, a professor of astronomy at New Hampshire Technical Institute.
“I don’t know of any other group of people besides the Celts who celebrate the ‘cross quarter’ holidays marked up here,” said Mr. Hill, an agile, sparely built man with a neatly trimmed beard. “You’ll find the same type of construction in Scotland, Ireland and England,” as well as other North American sites stretching from eastern Canada down to the Hudson River Valley, he said as we walked along. Cross-quarter days fall halfway between solstices and equinoxes.