Fuente de las Nereidas, Monumental fountain in Puerto Madero, Argentina.

Fuente de las Nereidas is a white Carrara marble fountain on the Costanera Sur in Puerto Madero, Buenos Aires. A rough pale rock base holds a seated Venus on an open shell, lifted by a standing female figure with a serpentine lower body. Two rearing horses emerge from the rock at either side, each held by a nude male figure.

Lola Mora completed the work in 1903 using Carrara marble from Italy, surprising Buenos Aires as the first female sculptor of a large public installation. Originally planned for Plaza de Mayo, the piece moved to Costanera Sur in 1918, where it still stands by the water.

The name comes from the Nereids, the fifty sea nymphs of Greek myth, daughters of Nereus and Doris, who surfaced to aid sailors such as the Argonauts. The group shows them attending the birth of Venus, with two rearing horses held by nude tritons, servants of Poseidon. The horses' bridles were broken in a vandalic act and replaced with ropes.

The fountain stands at the intersection of Avenida Tristán Achával Rodríguez and Padre Migone, opposite the south entrance of the Buenos Aires Ecological Reserve in Puerto Madero. Lola Mora herself directed the 1918 move to this waterfront spot. Approach on foot along the Costanera Sur promenade, from Puerto Madero or from the reserve entrance.

The monument sparked debate when first installed because some viewers considered the carved bodies too daring for a public square. This reaction helped move it from the central plaza to the waterfront, where the piece now stands as one of the most visited outdoor artworks.