Test your transport knowledge with these metro maps ... IT'S ROME! — The Rome Metro is the oldest of it's kind in Italy. ... Only New York's subway is busier. WMATA ...

Construction on a new subway line has uncovered marble busts, frescoes, mosaics, even ancient peach pits, dating back nearly 2,000 years. Archaeologists have also found an ancient military barracks.

While Rome already has two main subway lines, including one with a stop at the Colosseum, the Metro C line will penetrate the heart of the historic center and connect it to the Vatican and beyond ...