Phra That Wat Mon Phaya Chae is an ancient and sacred stupa situated atop a high hill at Wat Mon Phaya Chae. The stupa features a Lanna-style bell shape, covered in radiant golden "Thong Jangko" brass sheets. It enshrines Holy Relics of the Buddha, with local legends tracing its origins back to the era of Queen Chamadevi or the early arrival of Buddhism in Khelang Nakhon. The panoramic view from the stupa area is exceptional, offering a 360-degree perspective of Lampang city and the Khun Tan mountain range, symbolizing the intersection of profound faith and serene natural beauty.