Glymur is Iceland’s second-tallest waterfall and the tallest that is easily accessible by foot. Located in the fjord of Hvalfjörður, it stands at a height of 198 meters (650 feet). The cache is placed on the end of the main trail from the east side of the waterfall (approx.. 3,5 km from parking) in place above the waterfall when you need to wade the river Botnsa (or you can back the same way)