We only had a short visit on Mauritius as our primary purpose was to see the Echo Parakeets in Black River Gorges National Park. I do have a few suggestions that may be of help if you are planning to visit, especially if you are staying in Flic en Flac.
Driving through Flic en Flac. There are some touristy shops if you are into that sort of thing.
We had dinner at Zub Express in Flic en Flac which has good Indian and Chinese food at good prices. I wish they would get a better cage for these Indian Ringnecked Parakeets though. These are not the same as the endemic Echo Parakeets so they can’t be released here in Mauritius but they do need a better living environement.
This shopping centre on the road between Flic en Flac and Quatre Borne (where you turn south to Casela Nature Park) is a good place to get cheap ready made sandwiches, cakes, drinks and other picnic food.
Heading south on the coastal route towards Chamarel. You will make a turn at a sign-posted road to head up the mountain to enter the park.
Here is where you enter the Seven Coloured Earth park. There is a nominal fee, then you can drive around and see the coloured sand and some turtles. There is also a waterfall, cafe and gift shop.
There is a western entrance to Black River Gorges National Park with some hiking trails and picnic areas. It would be too far to walk to where the Echo Parakeets are from here and you can’t drive through the park. Coming from Chamarel, you need to go back up to Quatre Bornes, then down to the eastern entrance at Petrin.