Hoover Dam belongs to the Common Era — dated here to c. 1936 CE at Colorado River, USA. Dates mark a scholarly centre of gravity (dedication, completion, or iconic phase), not a single foundation day.
A concrete arch-gravity dam that tamed the Colorado and lit the Southwest — poured in interlocking blocks to manage heat.
How it amazes the brain
6.6 million tonnes of concrete, cooled with embedded pipes. Art Deco intake towers make infrastructure look ceremonial.
Why it counts as a wonder
It never needed a contest ballot to scramble the brain: scale, craft, or sheer improbability is enough.
Standing at the base recalibrates what “big” means.
On dating
CE means years after the traditional birth of Christ. A monument listed as c. 1936 CE may have been founded earlier, rebuilt later, or become famous only in one phase. Engineering wonders (dams, tunnels, orbiting labs) are dated to opening or assembly.
This is story 24 of 100 in The Trend Ledger’s illustrated desk on world wonders raised after the birth of Christ — the companions to our BCE series.