The Thriller is a high speed boat tour that combines speed with a tour of some of the attractions near the marina as well as a view of South Beach from the Atlantic. It starts off slowly going toward Star Island and homes of the rich and famous including Gloria Estafan, Shaq, Rosie O'Donnell and Oprah. You can see the skylines of Miami as well as the South Beach hotel skyline.
Once it enters the Atlantic from the harbor, it becomes more of a thrill ride as it turns up its speed; you can get sprayed or drenched depending on where you sit!
The crew is friendly and informative.
It's a pretty reasonable price and a fun activity for soemthing different when visiting Miami or Miami beach.