Just Wander More Discover things to do on Rab Island in Croatia and you might understand why it is called the Happy Island. Actually “Happy Island” is not a clever marketing slogan; the name is derived from the island’s Roman name of Felix Arba. Felix means happy and lucky and Arb is Illyric for dark and lush. If... This blog post is originally from 11 Things to Do on Rab Island: Discover the Happy Island of Croatia and written by Jolayne