Dettifoss is one of Europe's most powerful waterfalls, located in Vatnajökull National Park in northeast Iceland. It's a real showstopper, with the ground literally shaking under your feet as you get up close to its thunderous power. During the summer months, it's a must-see for those seeking awe-inspiring natural beauty. Just be prepared to get a little wet from the spray if you visit from the west side!