Kyichu Lhakhang is one of the oldest temples in Bhutan — built in 659 by the Tibetan king Songtsen Gampo, who legend says erected 108 temples in a single day across the Himalayas to pin down a giant demoness lying across Tibet and the surrounding regions, with each temple anchoring one part of her body. Kyichu pins her left foot. The temple is small, intimate, and still very much in active use; pilgrims circle the prayer wheels in slow clockwise motion, and the inner sanctum holds an 8th-century image of the Jowo Sakyamuni Buddha said to have been cast in Lhasa from the same mould as the more famous Jowo statue in Tibet.
The complex has two main shrines — the original 7th-century building and a 1968 sister temple commissioned by the Queen Mother as a memorial to her late husband. Walk both, slowly. The orange trees in the courtyard are reputed to bear fruit year-round, an unusual phenomenon at 2,300 metres altitude that the temple credits to its blessing. Photography is allowed in the courtyard but not inside the inner sanctum.
A 15-minute drive further up the valley brings you to Drukgyel Dzong — the ruined fortress that once guarded the trade route to Tibet via Tremo La pass. Built 1649 to commemorate Bhutan's victory over Tibetan invaders, the dzong was destroyed by fire in 1951 and remained a roofless shell for decades. Reconstruction was completed in late 2022, and the new dzong now stands fully restored with the snow-capped Mount Jomolhari (7,326 m) as a backdrop on clear days — one of the most photographed scenes in Bhutan. The walk around the dzong and the small courtyard takes 30-45 minutes.
Most itineraries combine both stops as a half-day morning excursion, often with a short walk in the surrounding rice paddies to absorb rural Paro valley life — farmers ploughing with horses or yaks (depending on altitude), the hand-built stone walls between fields, and prayer flags strung across the river crossings. Your tour operator's standard car-and-driver arrangement covers this comfortably; allow 4-5 hours including stops and photo time.