*POMPEII, ITALY: A paved street, the blocks in the road allowed pedestrians to cross the street without having to step onto the road itself which doubled up as Pompeii's drainage + sewage disposal system. The spaces between the block allowed horse drawn carts to pass along the road.
Pompeii's history reads like a Greek tragedy. Settlers originally flocked to the site of the Roman port city because of its fertile soil—the product of volcanic ash from nearby Mount Vesuvius. Yet that very same volcano would erupt and doom the city of 10,000 to 20,000 inhabitants in A.D. 79.