Welcome to Askja
Your first glimpse of the sapphire-blue lake Öskjuvatn, at the heart of the crater, is guaranteed to be a memorable one. The lake stands in contrast to the milky waters inside the small, steep crater known as Víti, adjacent to the caldera.
Although a bit on the chilly side (temperatures are currently about 22°C), a dip in Víti's milky blue pool is one of the highlights of an Askja adventure (and is sometimes done sans swimsuit). The route down is slippery and steep, so it may be closed for safety reasons by park officials.