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.
Bhutan is divided into twenty dzongkhags (districts), administered by a body called the Dzongkhag Tshogdu.
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.