The Jars sites in Xiang Khuang province are notable for thousands of stone jars carved more than 2,000 years ago.
They were either used to distil alcohol or as funerary urns.
"The stairway from the bottom to the top of the mountain is now awaiting energetic walkers to experience more than 1,000 steps up to the peak of Phou Keng," the Vientiane Times reported.
Keng Mountain was where the stone for the mysterious jars was mined, the newspaper said. The stairway was built with government funds of17 billion kip (2.1 million dollars).
DPA