Limits RegistryPUBLIC RECORD
Limits RegistryBetween Greenland and Iceland, cold, dense water from the Nordic Seas sinks and cascades over the Denmark Strait sill into the deeper Irminger Basin, dropping roughly 3,505 m in total — a far greater vertical drop than any waterfall above sea level, though it is a slow, diffuse density-driven current rather than a visible plunging waterfall. It is a key part of the global thermohaline ocean circulation that helps drive deep-ocean water mass formation in the North Atlantic.
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Between Greenland and Iceland, cold, dense water from the Nordic Seas sinks and cascades over the Denmark Strait sill into the deeper Irminger Basin, dropping roughly 3,505 m in total — a far greater vertical drop than any waterfall above sea level, though it is a slow, diffuse density-driven current rather than a visible plunging waterfall. It is a key part of the global thermohaline ocean circulation that helps drive deep-ocean water mass formation in the North Atlantic.
The greatest total vertical drop of any known underwater cascade, where dense cold water sinks and flows over a submarine sill — a distinct oceanographic phenomenon from any above-water waterfall.
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Permanent ID limitsregistry.com/limits/LR-LARGEST-UNDERWATER-WATERFALL
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Limits Registry. LR-LARGEST-UNDERWATER-WATERFALL. Largest underwater cascade on Earth. 2026.