The big bell near the main gate by the stupa - and girls, listen to this, you'll love Tibetan Buddhism: for Tibetan Buddhists, the bell is the symbol of the feminine and stands for WISDOM. Ha! The dorje (which means thunder I think) stands for the masculine aspect of the path to enlightenment. Hmmm... The bell and dorje used together are symbolic reflections of duality. This combination of method (dorje) and wisdom (bell) is a basic principle of Tantrism.