Holboni Dabagan is a place in the Celestial Mountains of Yongganguo, where the Great Qin Road intersects with the Sun Road.
The Sun Road was built in the 800s BG by civil earthbenders of the Nara Clan, to connect their capital at Gainan with the Nemu and Walrus Rivers. These rivers, which communicate to the Western Lake and North Sea, respectively, were important trade connections; the completion of the Sun Road laid the economic foundations for the Nara clan's successful challenge of the Jala clan's khaganate.
The Great Qin Road, on the other hand, is much more recent, dating the Earth Kingdom Civil War, where it was built to deliver Qin's army from their landing sites in Chenbao to the Central Earth Kingdom. It may be considered alongside the walls of Ba Sing Se as among the greatest works of civil earthbending extant in the world. Its construction through Yonggan State was desired and encouraged by the Aisin-Nara prince of Jin who was ruling as khagan at that time, and who threw his lot in with Qin the Great.
At the intersection of the Sun Road and Great Qin road was constructed a monument to the alliance between Qin and the Yonggan, with inscriptions and gigantic statues. Following Qin's death and the Hao Ting reconquest, the statues were defaced by the Royal Earth Army, and the monument fell into disrepair. Indeed, the official policy during the period of direct rule, was one of deliberate neglect. Nonetheless, the ruins have remained the subject of popular veneration, and lately, the Yonggan Nationalist regime has been engaged in archaeological and restoration work at the site.