Bhutan follows a policy of responsible tourism --- they have carefully managed and controlled the growth of tourist industry so that it does not adversely impact on either their distinct and deeply spiritual identity and cherished culture or damage their pristine and well-preserved environment. Hence, the total number of tourists in each year are not so high. Foreign visitors will travel to Bhutan by plane, using Royal Bhutan Airlines, namely Druk Air. The main airport is in Paro (65 kgs from capital, Thimphu). When visitors reach to Bhutan, there is no railway network in Bhutan, the visitors can travel this exotic land by road.