I like to go to Parque Nacional a la Bandera in the afternoon or at night. they light up the monument with the colors of the flag. During the day, you can take the elevator and go to the top of the monolith to have the best view of the river, the bridge, the island, and sides of the city. You can walk to the top of the stairs and stare at the flames of the tomb of the unknown soldier. Many couples seat on the steps to talk for hours.