The remains of an Iron Age building may have been unearthed during roadworks on the A9.
Evidence of a structure believed to have stood around 2000 years ago was discovered in the Highlands last month.
Archaeologists also found part of a stone tool and shards of ancient pottery at the site near Kingussie.
They became interested in the site after a geophysical survey showed a several anomalies beneath the surface.
Peter Higgins, senior project manager at the Orkney Research Centre for Archaeology (Orca), said: "We are tremendously excited by these finds in this archaeologically significant location.
"We are also pleased that we can work with Transport Scotland to make sure that these finds are recorded correctly without impeding the roadworks so vital to this Scotland's economic development."
Some 80 miles of the A9 are due to be converted into dual carriageway by 2025, a project expected to cost around £3bn.
Orca, which is part of the University of the Highlands and Islands Archaeology Institute, is working with Transport Scotland to document significant discoveries made during the works.
The newly discovered structure is a short distance from Raitt's Cave, an underground Iron Age shelter which may have been used to store food.