Scientists found the fort , built in 178 BC , using Lidar technology . Lidar 's pulsed light can detect objects that are hidden beneath trees . Main fort was on a hilltop 1.2 miles ( 2 km ) from shore of Bay of Muggia . Roman artifacts were also found , including hobnails for military shoes . History of the building of the fort coincides with the second world conquest .
Scientists found the structure , built in 178 BC , using Lidar technology . Lidar 's pulsed light can reveal structures that are hidden beneath trees . Main fort was on a hilltop 1.2 miles ( 2km ) from shore of Bay of Muggia . Roman artefacts were also found , including hobnails for military shoes . Timing of the building of the fort coincides with the second Istrian War .