Dettifoss is a waterfall located in Vatnajökull National Park in north‑east Iceland. Visitors can walk along marked paths to viewing platforms, observe the powerful cascades, and explore the surrounding volcanic terrain, particularly during summer when access is easier. It is regarded as one of Europe’s most powerful waterfalls, characterised by its high-water volume and rugged canyon setting, and the river’s strength makes swimming strictly prohibited. Accessibility and changing landscape conditions are important considerations when planning a visit.