The marsh's large lagoon is connected to the Caribbean Sea via a narrow strait (the La Barra channel) located between the town of Pueblo Viejo and the city of Ciénaga.
Guillermo Buitrago, who died very young - 29 years old - became a very important figure of the 20th century's folklore in Colombia.
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It was a massacre of workers for the United Fruit Company; an unknown number of workers died after the government decided to send the military forces to end a month-long strike organized by the workers' union in order to demand better working conditions.
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Ciénaga celebrates every year on January 20 the Fiesta del Caimán (Feast of the Caiman) honoring a local legend known as La Historia de Tomasita.
Seventeen kilometers away from Tolú is located the tourist town of Coveñas, where besides the beautiful beaches it is possible to taste the local food and enjoy of the ecotourism by a canoe trip in La Cienaga La Caimanera, a relict of the native animals and plants.