Actually it is not the only place for a holiday. With jungle adventure your sims can also go to selvadorada and rent a room there. Going into the jungle is optional, your sims can enjoy the rest of the world while they relax. The third option is batuu with the new pack but that is not a 'regular' vacation world like the other two.
Unfortunately the water in other worlds were not updated, so no swimming in the lake at granite falls :disappointed: . What you can do is change the lots. You could add a pool, maybe even make it look more like a natural pool with the water colours that come with get together or jungle adventure.
Another thing you can do to make it more interesting is replacing a rental lot with a community lot. I added a bar and a spa and it really helps to give my sims something to do.