5 days fishing for ice age browns – This trip is all about big browns and the big Arctic Char. Lake Thingvallavatn is the largest lake in Iceland, located only 40 minutes from Reykjavík. Thingvellir, where the Althingi, the Icelandic parliament was established around the year 930, is a place of historic significance. The lake lies along the North Atlantic Ridge, sitting where the North American and Eurasian tectonic plates separate from each other. It is also the home of the ice age brown trout.