The capital of Bhutan Thimphu lies in a sylvan valley, on a hillside on the bank of the river by the same name. One interesting fact about this city is that it is the only world capital without any traffic lights. The city is a storehouse of Bhutanese culture. The Trashi Chhoe Dzong or the fortress of Glorious Religion, and the Memorial Chorten are some of the old sites worth a visit.