Hornbjarg is an enormous cliff in the Hornstrandir Nature Reserve in the Westfjörds. It is one of the northernmost locations in the country.
Dropping sheerly into the ocean, the cliffs are renowned for their birdlife, being a notably popular nesting ground for guillemots. While many other species also nest here (particularly throughout summer), please note that puffins do not; the best cliffs for puffin watching in the Westfjords are at Látrabjarg.
At 534 metres and 429 metres, the tallest peaks of Hornbjarg are Kálfatindur and Jörundur respectively. These cliffs are noted for their unusual shape, sloping steeply inland and undulating in height across their length, giving the appearance of a great cresting wave.