Bhutan has four major river systems flowing swiftly out of the Himalayas that are regularly fed by glaciers in northern Bhutan.
Indian style sweet milky tea (ngad-ja) is widely available and may be served in a pot.
There are many ways to see Bhutan. A short trip for a week or less will introduce you to the world's last remaining Himalayan kingdom, with visits to the Paro and Thimphu valleys and perhaps an excursion to Punakha, the ancient capital.