I went to this sanctuary area. It's made up mostly of wetlands, trees, and an observation tower. The tower is the best place to observe the birds, but the authorities should spend a little money on this area to clean it up and make it more attractive for visitors. I saw maybe five types of birds including the little yellow warbler. There are no signs to help you identify what types of birds you are viewing nor is there any information about how the "sanctuary" was built. Tip: It's important the area at the right time of day: dusk and and dawn are the prime hours to be there. I arrived a little after dawn, but still spotted a variety of birds there, both from the tower and from the ground. Herons, ducks, moorhens etc -- and a peregrine falcon. But in tropical midday sun there will be few birds to be seen, so pick your visit time carefully.