"Skógafoss is one of the biggest waterfalls in the country with a width of 25 metres (82 feet) and a drop of 60 m (200 ft). Due to the amount of spray the waterfall consistently produces, a single or double rainbow is normally visible on sunny days." (Wikipedia)

Unfortunately, there was no sun that day, so no rainbow. It was possible to climb up a steep slope to view the falls from above; you can see people at the top of the rock.