Using a UV light after sunset, I searched the beaches of Lake Superior for Yooperlites. These rare glowing rocks only reveal ...
Watch as a rare fluorescent treasure hunt unfolds on the shores of Lake Superior where ordinary rocks hide a dazzling secret under UV light. Erik Rintamaki, a tour guide from Michigan, USA, takes ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results