The Parque de las Ciencias is Bayamón's main attraction: a sprawling open-air science and recreational park with a planetarium, a small zoo, a natural science museum, and themed pavilions dedicated to transportation, rocket science, and archaeology. It is particularly popular with families — children can wander between exhibits on grounds that feel more like a park than a museum.
The transportation pavilion has a collection of vintage cars and aircraft, including a Douglas DC-3 you can walk through. The planetarium runs daily shows in Spanish, and the small zoo holds Puerto Rican fauna alongside more exotic species. The grounds are well-shaded and pleasant for a morning, with food kiosks and benches scattered through.