Guatemala Personalized Tour of 4 hours is perfect to get to know Guatemala City. In these tour you can experience walking around the Historic Center or going to the many amazing archeological museums that's the city has to offer.
Also, if you don't have too much time and you want to get a quick visit to Antigua, this tour is perfect for you.
Any way, you can spend the 4 hours doing the things that you want at your own time.