What is the fine-grained topic of the following text: From the Askja strato volcano and Dyngjujökull Glacier to the Kverkfjöll mountain range and Ásbyrgi canyon, one of Iceland's youngest lava fields at the Krafla volcano area, Akureyri is bursting with a number of geological wonders. Only return the topic.
Geological wonders in Akureyri, Iceland