The country currently has no UNESCO World Heritage Sites, but it has eight declared tentative sites for UNESCO inclusion since 2012. These sites include Ancient Ruin of *Drukgyel Dzong (map), *Bumdeling Wildlife Sanctuary (map), *Jigme Dorji National Park (map). *Royal Manas National Park (map). *Dzong architecture: the centre of temporal and religious authorities *Punakha Dzong (map), *Wangdue Phodrang Dzong (map), *Rinpung Dzong (map), *Trongsa Dzong (map) is the largest dzong fortress in Bhutan.
The most important centres for tourism are in Bhutan’s capital, Thimphu, and in the western city of Paro, near India. *Taktshang (map), a cliff-side monastery (called the “Tiger’s Nest” in English) overlooking the Paro Valley, is one of the country’s attractions.
The majority of tourists do “cultural tours” where they visit important destinations. *Paro, *Thimphu, *Punakha, *Phobjikha, and *Jakar are popular destinations. Further afield, the unexplored region of *Zhemgang (birders paradise, excellent wildlife viewing) and Eastern Bhutan have just been opened up to tourism. If you are an adventurist and want to explore the unexplored the east of Bhutan is the place for you.
The best time to visit Bhutan is the spring and winter season. In the spring (March to June) the jacaranda and rhododendron trees can be seen in full bloom. In the winter (October to December) visitors get an unobstructed view of the snow-capped Himalayan range bounding Bhutan due to clear sky with little to no rain.
*Paro Airport is the only international airport in Bhutan.