Major 'magnetic anomaly' discovered deep below New Zealand's Lake Rotorua 

 Lake Rotorua, which sits at the heart of a dormant volcano and is the setting for one of New Zealand's most famous Māori love stories, has been mapped in detail for the 1st time. 

https://cdn.mos.cms.futurecdn.net/NgtDLFHU4eQHT8c5VBqPAm.jpg

https://www.space.com/bizarre-magnetic-anomaly-discovered-deep-below-new-zealands-lake-rotorua