As I kayak just off the west end of Waikiki Beach, I'm trying to imagine how Diamond Head, a hulking 762-foot-high mass of magmatic debris, might have appeared in the 11th century.

On Wednesday, July 3, KHON2.com’s Unfit Adventurer decided to hike one of Hawaii’s most iconic volcanic mountains, Lēʻahi. Most everyone knows this place as Diamond Head.

Diamond Head s cone is a perfect example of a tuff cone. Unlike other forms of volcano cones, a tuff cone forms when super-heated water causes lava to burst into clouds of ash. The ash falls back ...

"Given the erodable nature of the ‘tuff’ that makes up Diamond Head, it is very likely that Diamond Head is continuing to decrease in height," said Yara Lamadrid-Rose, coordinator of Diamond ...

HONOLULU (KHNL) - It's Hawaii's most famous natural landmark, over a half million people hike to the top of Diamond Head every year. But while many take in the scenic sights, there are many parts ...