SAUDI ARABIA (WKRC/CNN NEWSOURCE) - Archaeologists have discovered an incredible 4,500-year-old highway in Saudi Arabia lined with ancient tombs.

Aerial surveys and satellite images helped Australian researchers make the important discovery.

The funerary avenue stretches for hundreds, perhaps even thousands of miles, perhaps all the way into Yemen.

There are at least 18,000 tombs lining the route and many are surprisingly well-preserved.

The next step is to do more radiocarbon dating to learn more about the tombs which reach back into the Bronze Age.