Phillip Island is a huge island located in Victoria. It's easier to get to than you would expect, it's only about a 90 minute drive from Melbourne. It's a large island so it has a lot of different activities and points of interest. Getting around the island might be kind of annoying unless you rent a car, since there are not many options in terms of public transportation. There are only 2 bus lines that I know of and that's about it. Phillip Island is worth visiting just for the amazing views alone, but there's plenty of other things that might interest you.
Points of interest
Stunning view of the coastline and a great place to take a walk
Very interesting and unusual rock formation, and a great view as well
Very tasty pies and good service, this place didn't disappoint
Phillip Island Bakery
Delicious baked goods and a nice place to have a coffee