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Dettifoss Trivia Questions

How much do you really know about Dettifoss? Below are 8 true or false statements. Click each one to reveal the answer and explanation.

1.

Visitors can safely swim in the pool directly at the base of Dettifoss.

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Easy
✗ FALSE

The plunge pool is extremely dangerous due to powerful currents, cold water, and submerged rocks—no swimming allowed.

2.

Dettifoss is located on the Jökulsá á Fjöllum river, which originates from a glacier.

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Easy
✓ TRUE

The river flows from the Vatnajökull glacier, giving Dettifoss its milky, sediment-rich glacial water.

3.

Dettifoss has a lesser-known twin waterfall called Selfoss just a kilometer upstream.

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Medium
✗ FALSE

Selfoss is indeed nearby, but it's a separate, wider waterfall—not a twin. The statement is false because it claims they are twins.

4.

Dettifoss is often described as the most powerful waterfall in Europe.

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Medium
✓ TRUE

With a flow of 193 cubic metres per second and a 44-metre drop, Dettifoss's immense hydraulic power earns it the common designation as Europe's most powerful waterfall.

5.

Dettifoss freezes completely solid every winter, stopping all water flow.

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Medium
✗ FALSE

While ice forms around the edges and mist freezes on rocks, the main flow rarely freezes solid due to high volume and current.

6.

Dettifoss is taller than Niagara Falls, with a drop of over 100 meters.

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Medium
✗ FALSE

Dettifoss drops about 44 meters, far less than Niagara Falls (51 meters). Its fame comes from volume, not height.

7.

Dettifoss is featured in the opening scene of the movie 'Prometheus' (2012).

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Hard
✓ TRUE

Ridley Scott used footage of Dettifoss as the backdrop for the film's opening, depicting an ancient Earth landscape.

8.

The canyon downstream of Dettifoss is part of a massive volcanic fissure system.

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Hard
✓ TRUE

Jökulsárgljúfur canyon was formed by catastrophic glacial floods and volcanic activity, part of the Krafla fissure swarm.

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