The Port of Miami is home to the biggest cruise ship industry. Several cruise ships come in and out daily. I don't think I went one day without seeing at least one ship. In fact, during our trip in Miami, the cruise ship NCL Pride of America made its debut and hosted the show Live with Regis and Kelly right from the Port in Miami.
Cruse ships come in and out all day long and sit right off the toll bridge from Miami's main land and South Beach. As you drive in every day you will see several cruise ships there in the post. Not only will you see the cruise ships you will also see lots of cargo and other goods that are shipped from there as well. You can see these cruise ships when they leave the port out on the beach.
If you have never seen a cruise ship they are huge and truly a sight to see. The whole port in Miami is a sight to see and something everyone should experience. There are several places around the port that you can pull off the road and look at the ships and sit and enjoy the quietness. I recommend taking a visit.