سیلفرا

Also known as Silfrugjá, Silfrugja

thumb|Silfra fissure thumb|The Mid-Atlantic Ridge passing through Þingvellir thumb|Rocks and boulders that have piled up in the fissure due to earthquakes. Silfra () is a rift formed in the Mid-Atlantic Ridge – the divergent tectonic boundary between the North American and Eurasian plates – and is located in the Þingvallavatn Lake in the Þingvellir National Park in Iceland.