The provincial boundary between Lampang and Lamphun at Doi Khun Tan is one of the most popular check-in points for tourists. Located on the road in front of the Doi Khun Tan National Park headquarters, the border is clearly marked with distinct colors and province names (Lampang in brown/green and Lamphun in green/blue, depending on recent renovations). Visitors often pose for photos in a "one step, two provinces" style, standing on both sides of the line simultaneously. Additionally, there is an observation tower for capturing aerial views of the boundary and the park office in a single shot.