LONDON — Archaeologists have discovered a smaller prehistoric site near Britain’s famous circle of standing stones at Stonehenge.

Researchers have dubbed the site “Bluehenge,” after the color of the 27 Welsh stones that were laid to make up a path. The stones have disappeared, but the path of holes remains.

The site is about a mile away from Stonehenge, which is believed to have been built around 2500 B.C. Bluehenge is thought to date to the same period.