Architecture, Building, Archaeology, Flagstone, Urban, Town, City, Crypt, asia, southeastasia, north thailand, thailand, chiang rai, golden triangle, goldentriangle, chiang saen, chiangsaen, mekong, mekong river, river, landscape, nature, border river, thai river, thailand river, lao, laos, myanmar, border, thai, sop ruak, lao border, myanmar border, thailand border, scenery, Burma, landmass, district, stream, kadai, sino-tibetan, vicinity, edge, tai, asian country