We fit as much into one day as possible, starting with a guided tour of the Coliseum which took us down into the lower tunnels and up to the topmost level.  Then walked about 5 miles to visit Trajan’s column, the Pantheon, the Trevi Fountain, and Vatican City to see Michaelangelo’s ceiling and the Last Judgment in the Cistine Chapel.  We also managed to fit in two meals and some gelato along the way.  A very full day, but definitely worth the walking!