In Ukunda for a holiday? There are severl things you must do:

Make a safari - there are many options available, including more "touristy" destinations, or more "off-the-beaten-path" options, like Neptune Village, where the monkeys wake you up in the morning and you get a real sense of Africa.

You can also go on a dhow sailing safari off the Kenya Coast. You will be able to waken to the sun rising over the Indian Ocean, go scuba diving, catch your own fish for dinner, and swim and camp out on your own little desert island. Some dhow sailing tours also offer you the possibility of swimming with dophins.

Visit the Ukunda Market to mingle with natives and fellow tourists to do some shopping.