There are clear signs to the waterfalls on route 1, and you can see the falls from the road. No chance of missing them.
Seljalandsfoss Waterfalls are located close to route 1 in Iceland. The spectacular falls can be seen from all sides as there is a trail that takes you behind the falls. You have to have a raincoat and best to cover your camera in a protective rain sleeve. Splattering drops will find their way to everything you have with you, so be ready. That said this is an amazing spot to visit.