HistoryNeolithic (c. 9600-8000 BCE)Southeastern Turkeyhigh confidence

Göbekli Tepe contains huge stone vessels capable of holding more than 40 gallons of liquid.

Notes on verification

Confirmed by multiple independent sources including a peer-reviewed study reporting trough volumes up to 165 liters (~43.6 gallons), consistent with the claim of 'more than 40 gallons.' [cascade flags: aggregator_dropped_primary_exists | tier=silver indep_score=0.867 clusters=3 claim_tier=notable]

Sources