A good place to spend the day does not have to be far from the city. Our team had our very first GA from a resort just a few minutes away from where we work and the place was called Circle Island Resort in Cavite.
The resort had a slide and a number of pools to choose from and with varying depths to swim at.
Although I'm not so sure about the theme of the place, probably native american due to design of the pools, a tunnel and plenty of rocks and plants that surround the pools.
They also have different cottages, a restaurant, videoke facilities and grills for those who prefer to cook their own meal.
In all, it was a very nice place with reasonable rates Php90 to Php200 for the entrance fee, Php500 to Php3,000 for the cottages with hotel amenities as well. In my opinion it was a very nice place and budget friendly.