Phou Asa is considered the unique feature of southern part in Laos. Its style is building like the giant mushroom rising up to the sky. This unique type of architect is available in Kiet Ngong village, Phatoumphone district of Champasak province.
The stones and rocks using are in small size. They are not connected by any kind of glue, but just the rocks are arranged together according to the prior shapes. The strange way of construction is still the big question for archeologists. Phou Asa is acknowledged to be the national heritage since 13th October 1993.