What Is the World's Tallest Waterfall?
April 17, 2026
The world’s tallest waterfall is not Angel Falls in Venezuela, but rather the Denmark Strait Cataract, an underwater waterfall that plunges 11,500 feet beneath the ocean between Greenland and Iceland. This invisible giant is more than three times taller than Angel Falls and moves an astounding 175 million cubic feet of water every second.
The Hidden Giant of the Denmark Strait
The Denmark Strait Cataract exists because of a dramatic difference in water density. Cold, dense Arctic water from the Nordic seas encounters the warmer waters of the Irminger Sea, creating an underwater cliff where the heavy water literally falls to the ocean floor. This massive cascade drops continuously along the Denmark Strait, creating what scientists consider the largest waterfall on Earth by volume and height.
What makes this waterfall particularly remarkable is its invisibility from the surface. Ships can sail directly over this underwater giant without any indication of the massive cascade occurring thousands of feet below. The ocean surface remains completely calm, masking one of nature’s most powerful phenomena.
The Power Behind the Flow
To put the Denmark Strait Cataract’s flow into perspective, it moves approximately 175 million cubic feet of water per second – that’s roughly 5 million cubic meters. This volume exceeds the combined flow of every river on Earth. In comparison, Angel Falls, previously considered the world’s tallest waterfall, drops 3,200 feet and has a flow rate that varies seasonally but never approaches the consistent massive volume of its underwater counterpart.
This underwater waterfall is part of the global thermohaline circulation system, often called the “global conveyor belt” of ocean currents. The dense, cold water that cascades down the Denmark Strait continues along the ocean floor, eventually circulating throughout the world’s oceans.
Climate Regulation and Global Impact
The Denmark Strait Cataract plays a crucial role in regulating Earth’s climate. This underwater waterfall drives the Atlantic Meridional Overturning Circulation (AMOC), which transports warm water northward in the Atlantic and cold water southward in the deep ocean. This circulation pattern helps distribute heat around the globe, moderating temperatures in Europe and affecting weather patterns worldwide.
Scientists warn that if this underwater waterfall system were to weaken or stop, global ocean circulation could collapse, leading to dramatic climate changes. The cooling of Europe, changes in precipitation patterns, and disruption of marine ecosystems would be just some of the consequences. Current research suggests that climate change is already affecting the strength of this circulation, making the Denmark Strait Cataract a critical focus for climate scientists.
Discovery and Ongoing Research
Unlike surface waterfalls that humans have observed for millennia, the Denmark Strait Cataract was only discovered through modern oceanographic research. Scientists use sophisticated instruments including CTD (Conductivity, Temperature, Depth) sensors, autonomous underwater vehicles, and satellite altimetry to study and monitor this hidden waterfall.
Ongoing research continues to reveal the complex dynamics of underwater waterfalls and their role in global ocean circulation, making the Denmark Strait Cataract one of the most important yet invisible natural phenomena on our planet.
FREQUENTLY ASKED
How was the underwater waterfall discovered? ▾
The Denmark Strait Cataract was discovered through modern oceanographic research using specialized instruments that can measure water density, temperature, and current flow patterns beneath the ocean surface.
Can you see the underwater waterfall from above? ▾
No, the Denmark Strait Cataract is completely invisible from the ocean surface, with ships able to sail directly over it without any visual indication of the massive waterfall below.
What would happen if the underwater waterfall stopped? ▾
If the Denmark Strait Cataract stopped flowing, it could collapse global ocean circulation patterns, leading to dramatic climate changes including cooling in Europe and disrupted weather patterns worldwide.
