4,000-year-old Cretan hilltop mystifies Greek archaeologists. It could spell trouble for new airport

A big, round, 4,000-year-old stone building discovered on a Cretan hilltop is puzzling archaeologists and threatening to disrupt a major airport project on the Greek tourist island.

Greece's Culture Ministry said Tuesday that the structure is a "unique and extremely interesting find" from Crete's Minoan civilization, famous for its sumptuous palaces, flamboyant art and enigmatic writing system. Resembling a huge car wheel from above, the ruins of the labyrinthine, 1,800-square-meter (19,000-square-foot) building came to light during a recent dig by archaeologists.

The site was earmarked for a radar station to serve a new airport under construction near the town of Kastelli. Set to open in 2027, it's projected to replace Greece's second-biggest airport at Heraklion, and designed to handle up to 18 million travellers annually.

Archaeologists don't yet know what...