Bhutan was the last of the "hermit kingdoms" to open up. Even today there is very little of the modern world in Bhutan, and the door is only cracked open. Each visitor still needs a letter from the government approving the visa. (We obtain these for you).
Bhutan offers incredible trekking opportunities. Unlike other Himalayan trekking, Bhutan's countryside is mostly wilderness, with only occasional villages or outposts. The trekking is strenuous and spectacular.
The culture and sightseeing draw many visitors to Bhutan. The entire country is a fascinating other-when. Visit schools, a nunnery, homes and the great "dzongs". Dzongs are Bhutan's great fortified monasteries, which administer the devoutly Buddhist people's religious life, civil society, and, historically, defense.
Bhutan's colorful festivals are ancient and celebrated today with all the splendor of old. Whether you are coming for a cultural program or a trek, consider scheduling your trip (well in advance) to coincide with brilliantly-colored parades, masked dances in jeweled halls, and fire ceremonies at night during Bhutan's many festivals.
The best guide book about Bhutan is the Lonely Planet's. It is titled, simply, Bhutan. (Amazon link) The author for the first editions was Stan Armington, who also wrote the Lonely Planet's Nepal trekking guide. Françoise Pommaret's Bhutan: Himalayan Mountain Kingdom is also well worth buying or taking out from the library.