Callanish Stones belongs to the years before the Common Era — dated here to c. 2900 BCE at Isle of Lewis. The date is a scholarly centre of gravity, not a foundation-stone timestamp.

A cruciform avenue of Lewisian gneiss, older in parts than Stonehenge’s sarsens, aimed at lunar standstills over the hills.

How it was made

A central circle and chambered cairn. Peat buried the bases for millennia.

Why it still counts as a wonder

It never needed a Greek list to be a wonder: the labour, the alignment, or the survival is enough.

The wonder is latitude: megaliths as a North Atlantic science project.

On dating

BCE in this series means years before the traditional birth of Christ, counted backward. A monument listed as c. 2900 BCE may have been founded earlier, rebuilt later, or famous only in one phase. Where ancient writers disagree — as they do for Babylon’s gardens — we say so.

This is story 79 of 100 in The Trend Ledger’s illustrated desk on world wonders raised before the Common Era.