Kerið (Volcanic Crater)
The crater Kerið was formed about 6,500 years ago, making it roughly half the age of most volcanic calderas found in Iceland and it lies at the northern end of a row of craters known as Tjarnarhólar.
Kerið is approximately 55 metres (180 feet) deep, 170 metres (558 feet) wide and 270 meters (886 feet) in circumference. It is a short and easy walk from the parking lot to the edge of the crater and it is possible to take a path around the crater and to descend down to the pristine waters of the crater lake. According to an old tradition, a rise in the water level here is accompanied by a corresponding fall in the pond on Búrfell in Grímsnes and vice versa.