From YouTuber Kayliegh: The Standing Stones of Callanish on the Isle of Lewis in the outer Hebrides of Scotland have fascinated many for thousands of years. The first traces of human activity on this stone circle date back to more than 5000 years ago, to 3000 BCE.
They are indicated by a broad ditch which belonged to some kind of structure or enclosure, although unfortunately it’s no longer visible above ground. Post-hole evidence of wood charcoal shows that a timber circle used to be on the same site predating the current stone ring. We see this with many stone circles, they usually were predated by a wood circle that was built and rebuilt over time, eventually after a few hundred years the descendants of the original wood henge builders replaced the wood with stone and created their own monument.
They are indicated by a broad ditch which belonged to some kind of structure or enclosure, although unfortunately it’s no longer visible above ground. Post-hole evidence of wood charcoal shows that a timber circle used to be on the same site predating the current stone ring. We see this with many stone circles, they usually were predated by a wood circle that was built and rebuilt over time, eventually after a few hundred years the descendants of the original wood henge builders replaced the wood with stone and created their own monument.