Pompeii - Crossing stones
Some crossing stones on one of the streets of the ruins of Pompeii in Italy, the city which was devastated by the eruption of Vesuvius during the times of the Roman Empire.
Interactive tool lets you explore the Roman Empire's roads an
The map (pictured) was created by Stanford University. It features 632 sites and covers close to 4 million square miles (10 million square km) of land and sea.
Roman technology aimed for The Big.From aqueducts to roads, the Romans used concrete as their material and construction techniques like the arch to achieve aqueducts and buildings of astonishing size and roads of lasting durability.