Let's be honest, this is a grubby little park with sellers and people wanting to sell you something but whatever you do don't miss it. You're never going to see an unassuming park like this in the middle of a city with so many different species of wild animals. From Iguanas to monkeys to squirrels to vultures and there's even a sloth family. Go early in the morning when it not so hot as the animals are harder to find during the middle of the day. Sometimes you'll have a random guy in the park who'll offer to show you where they all are and I suggest you take him up on it. He'll usually know where each bunch of animals are at a given time and all he'll want in return is the loose change you have in your pocket. Trust me, they're there but hard to see sometimes so paying a few undred pesos is well worth it. It's a very busy and open public park so it's safe too if you're worried about that.