The Maine Monument stands at Merchants' Gate to honor the sailors who perished when the USS Maine exploded in Havana harbor, when Cuba was still under Spanish rule. It was designed by Harold Van Buren Magonigle.
The monument consists of a pylon with a fountain at its base and sculptures by Attilio Piccirilli surrounding it. A sculpture group of gilded bronze figures atop the pylon represent Columbia Triumphant, her seashell chariot being drawn by three hippocampi. The bronze for this group reportedly came from metal recovered from the guns of the Maine. On the park side of the monument is fixed a memorial plaque that was cast in metal salvaged from the ship.