Vatnsskarð
Iceland
Vatnsskarð is a mountain pass between Húnavatnssýlsa and Skagafjörður Counties in Iceland. Route 1 uses it. There is a lake in the pass named Vatnshlíðarvatn, and the county border is just east of it. A stream (called Arnarvatnslækur or Sýslulækur) runs into the lake and it is on the county border.
Data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).