Addressing a Greek audience, Strabo gives us this impression of the physical aspect of the mighty city that had mastered the Greek World.. He wrote in the age of Augustus. The city probably continued to increase in magnificence for the next two hundred years, and a number of the most famous buildings, e.g. the Flavian Amphitheater, were not yet erected.
The Greek cities are thought to have flourished mainly on account of the felicitous choice made by their founders, in regard to the beauty and strength of their sites, their proximity to some haven, and the fineness of the country. But the Roman prudence was more particularly employed on matters which have received but little attention from the Greeks---such as paving their roads, constructing aqueducts, and sewers. In fact they have paved the roads, cut through hills, and filled up valleys, so that the merchandise may be conveyed by carriage from the ports. The sewers, arched over with hewn stones, are large enough in parts for actual hay wagons to pass through, while so plentiful is the supply of water from the aqueducts, that rivers may be said to flow through the city and the sewers, and almost every house is furnished with water pipes and copious fountains.
We may remark that the ancients [of Republican times] bestowed little attention upon the beautifying of Rome. But their successors, and especially those of our own day, have at the same time embellished the city with numerous and splendid objects. Pompey, the Divine Caesar [i.e. Julius Caesar], and Augustus, with his children, friends, wife, and sister have surpassed all others in their zeal and munificence in these decorations. The greater number of these may be seen in the Campus Martius which to the beauties of nature adds those of art. The size of the plain is remarkable, allowing chariot races and the equestrian sports without hindrance, and multitudes [here] exercise themselves with ball games, in the Circus, and on