Guanghua Temple (广化寺, "South Mountain Guanghua") sits at the foot of Phoenix Mountain, 2 km south of Putian old town. Founded in 588 CE during the Sui dynasty, it's one of the four great Buddhist monasteries of Fujian — together with Gushan Yongquan in Fuzhou, Kaiyuan in Quanzhou, and Nanputuo in Xiamen.
What makes it quieter than the other three is simple: Putian is off the main tourist route. The 32,000+ m² compound runs uphill through multiple halls and courtyards, with a working seminary attached — you'll see young monk-students crossing between classes and evening chants. Behind the temple, the Longmen Stone Cave trail (500 m from the rear gate) winds up the mountain for a quiet 45-minute walk with views back over the city.
Practical: free admission; modest dress. Open 07:00–17:00 daily. Vegetarian canteen open at lunch for 30 CNY. Taxi from Putian Railway Station 20 minutes, or bus 2/11. Combine easily with Putian old town and a bowl of braised noodles for a half-day.