The main highlight of the day is the hike to one of Bhutan's most venerated pilgrimage sites, the Taktsang Goemba, commonly referred to as the 'Tiger's Nest'. According to legend, Guru Rinpoche miraculously flew here on the back of a tigress, meditated in a cave here for three months and converted the whole of Paro valley to Buddhism. Resting at an altitude of 900 m above the valley, Taktsang is an architectural wonder and the spectacular four hour walk will be your most overwhelming experience ever.Drive on to visit Drukgyel Dzong (the ruined fortress -17 km from the town), built in 1647 by Shabdrung Ngawang Namgyal to commemorate his victory over the Tibetans in 1644. Drukgyel means 'fortress of the victorious Drukpas'. The Dzong, with a delightful village nestling at its foot, and the Mount of Jumolhari (Alt 24,000 feet) appearing as a back drop on a fine weather is an awe-inspiring sight. On the way back, stop at one of the oldest temples in Bhutan, the Kyichu Lhakhang built in the 13th century by the famous Buddhst Tibetan king, Songtsen Gampo . Overnight: Gangtey Palace/Olathang hotel/Janka resort, Paro.