We will visit three oldest Buddhist countries in the world, one of which - Bhutan, is considered the happiest in the world. Let's start with picturesque India, where we'll visit Darjeeling and Sikkim - the former Himalayan kingdom. In Nepal we will see the stunning valley of Kathmandu with its ancient cities and temples. The highlight of the trip is the mysterious Bhutan, where the Buddhist idea of happiness became a state principle.