Petrel Lagoon (Spanish: Laguna de Petrel or Laguna Petrel) is a coastal lagoon located in Pichilemu beach, Chile, in front of Pichilemu railway station.

[1][2] It contains a high percentage of sea water, and it was formerly one of the main attractions of Pichilemu.

[1] It is named after the hacienda San Antonio de Petrel, located nearby Pichilemu.

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