Tvindefossen is a 152-metre waterfall right beside the E16, about 12 kilometres north of Voss toward Flåm. You really cannot miss it - the water cascades down in multiple strands, spreading gracefully across the rock face.
This is one of Norway's most accessible major waterfalls. You can park at the base where there's a campsite and kiosk, then walk right up to feel the spray. Tour buses stop here regularly, so it can get busy during peak season.
The waterfall looks best in late spring and early summer when snowmelt feeds the flow. By late summer it can run quite thin. There's a path to the top if you want a different perspective - about 300 to 400 metres of walking.
Now, there's a story behind this place. Back in the early 1980s, a tour guide decided the drive between Voss and Vik needed livening up. He invented a tale that the water had rejuvenating powers - a West Norwegian fountain of youth. The joke spread through the tourism industry like wildfire. By 2000, a local journalist had renamed it "Viagrafossen" and the nickname stuck.
At its peak, around 200,000 tourists a year were climbing up to fill bottles - busloads from Japan, Russia, America, and across Europe. The campsite owner counted over 3,400 tour buses in a single summer. Whether anyone actually believed the myth is another matter. But the water is free, the setting is beautiful, and who doesn't want to feel ten years younger?