This is the largest flagpole support in Korea, carved from a single massive stone. Currently, the lower part is buried, making it impossible to identify the base structure that once supported the flagpole. The four sides are plain without decoration, and the lower section still bears the rough lines from the initial stone-carving process. The inner and outer faces are vertical, while the top of the pillars curves gracefully into a pointed peak, although the southern tip is slightly damaged.

Designated as Treasure No. 86 in 1963, these supports are relics of Gulsansa Temple, founded by National Preceptor Beomil. Standing at 5.4 meters tall, they feature two holes (upper and lower) to secure the flagpole. The massive scale and simple yet powerful carving technique showcase the grand sculptural beauty characteristic of the Unified Silla period.

The supports are located on flat ground surrounded by rice paddies near Haksan-ri village. You might wonder if you are in the right place while following the navigation, but you will soon find the sign for the site. Once you arrive, you will be overwhelmed by the sheer scale. It is not just the height but the thickness of the stones that creates a sense of awe-inspiring grandeur.