The round hike takes about 4 Hr. After lunch Visit Drugyal Dzong (a ruined fortress), 16 kilometers away from Paro town. Although it has been in ruin but this Dzong has its great historical importance for the people of Bhutan. It was a place where the Bhutanese finally defeated the Tibetan invasion and drove them back. On a clear day one can view the sacred Mt. Jhomolhari (Mountain of Goddess). Its altitude is 7,329m.