When traveling to a new place, you will likely want to fill your days with all kinds of activities. Certain destinations are known for certain activities & nobody wants to miss out on experiencing everything they can. However, as always, it is important to be mindful about what you support. 
As an animal activist, I think it is crucial to avoid animal tourism activities. From swimming with dolphins, to watching animal shows, to riding elephants, most of the time, these animals are being mistreated. Before booking a tour or deciding on a certain activity, look into it. Find out everything you can before supporting it. Entertainment is not worth the suffering of another living being. 
There are plenty of fun, entertaining, & thrilling activities you can partake in that will not negatively impact anyone or anything else.