Bhutan has four major river systems flowing swiftly out of the Himalayas that are regularly fed by glaciers in northern Bhutan.
Bhutanese food is rice, generally a local red rice, served with either a little dried meat cooked with very hot chilies or red capsicum onum or a sauce made from chilies and local cheese. Bhutan food is generally know for it's simplicity but in reality it really is quite a specialty to marry the flavours and the spices... not to mention the effort involved in getting and maintaining the ingredients.
Bhutanese currency is Ngultrum (Nu.) and is officially pegged to the Indian Rupee. Also Indian Rupee is acceptable all over Bhutan except Rs 500 and Rs 1000 currency notes.