Towering above the landscape of Washington State ... NASA has even tested ice cave-exploring robots in the ice caves of Rainier. Changes in the caves’ structure could also alert scientists ...

Photos of a rainbow-hued world inside an ice cave on the flank of Mount Rainier have prompted the National Park Service to issue a warning about entering the sometimes treacherous maws.

The ice caves at Mt Rainier National Park in Washington gained viral attention after photographer Mathew Nicholas shared jaw-dropping visuals last month. “When the sun hits the outside of these ...

photographer made *** dazzling discovery in Washington state when he stumbled upon *** rare rainbow illuminating the inside of an ice cave in Mount Rainier National Park. The crystallized hues are ...