What twin volcanic peaks are symbolized by Saint Lucia's flag triangles?

The twin volcanic peaks symbolized by Saint Lucia’s flag triangles are the Pitons.

The two triangles represent Gros Piton and Petit Piton, the dramatic volcanic cones on Saint Lucia’s southwestern coast. Together, these peaks are known as the Pitons and are among the island’s most recognizable natural landmarks. Their triangular forms are echoed by the flag’s central geometric design.

Saint Lucian artist Dunstan St Omer designed the flag, which was adopted on 1 March 1967, when the island became an Associated State of the United Kingdom. Saint Lucia kept the design after independence on 22 February 1979, although the shades and proportions were adjusted over time.

The surrounding colours add further meaning. Cerulean blue represents the sky and surrounding Caribbean and Atlantic waters; black and white suggest harmony between racial groups; and yellow evokes sunshine and prosperity. The Pitons are sometimes confused with other Caribbean volcanic peaks, such as Soufrière Hills in Montserrat, but they are specifically Gros Piton and Petit Piton in Saint Lucia.