When you visit a Buddhist monastery in Nepal's high Himalayas, you'll often see hundreds of small flames flickering before statues and prayer wheels. These are butter lamps, usually fueled by yak butter, offered as symbols of wisdom, devotion, and spiritual guidance. For many hikers on the Manaslu Circuit Trek, the Everest Base Camp route, and the Annapurna Circuit, seeing these glowing lamps is often their first glimpse of the rich cultural traditions of the mountains.