You can't go to an ancient city and not be touristy. Courtney and I spent one day exploring ancient Rome as well as all the touristy attractions and the other exploring Vatican City, learning a lot along the way. Though I'm embarrassed to admit it, we were a bit hesitant to go to the Vatican Museums because entry was pretty pricey. Luckily, we decided it was worth it, coughed up the Euros, and went in to be completely blown away. We literally could have spent both days taking in everything there is to see in the museums - they're massive! When I had gone with my parents back in March, the Sistine Chapel had been closed due to the recent election of the Pope, so I was thankful to get the chance to go back. Also, don't be intimidated by the line to get into St. Peter's Cathedral. It moves really quickly, entrance is free, and no matter how many cathedrals you've seen and toured, this one will still leave you speechless.
Between taking selfies in the Colosseum, the cliche pictures of us throwing our coins and making wishes into the Trevi Fountain (really difficult to do because it's always so crowded!), and posing along the Spanish Steps, we saw most of the major landmarks Rome has to offer and most importantly, had fun doing it!