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Mandaluyong, Second District, Metro Manila, Philippines (14.57778 121.03323)
Another claims that the Spaniards named the place based on the report of a navigator named Acapulco, who saw the rolling hills frequently being lashed at by daluyong (“big waves from the sea”). This seems to confirm traditional pre-Hispanic stories that giant waves from the sea would meet the adjoining hills of the vast lowland, referred to as salpukan ng alon. Felix dela Huerta, a Franciscan historian, observed that the rolling topography of this land resembled giant waves of the sea.