Laguna Verde in Bolivia is a breathtaking natural wonder, but the emerald-green waters of the lake hide a deadly secret – it is one of the most poisonous lakes in the world
Nestled amidst the rugged landscapes of Bolivia, Laguna Verde is a captivating sight to behold. However, beneath its enchanting emerald-green waters lies a lethal secret – it’s one of the most toxic lakes in the world. Situated at the base of the majestic Licancabur volcano within the Eduardo Avaroa Andean Fauna National Reserve, this remarkable lake resides over 4,300 meters above sea level.
The lake is heavily polluted with high levels of arsenic, copper, and other minerals, creating an environment too hostile for life to thrive. The distinctive green tint of the lake is attributed to the high concentration of dissolved copper which, when combined with arsenic, makes the water highly poisonous.
Yet, despite its perilous nature, Laguna Verde continues to attract adrenaline junkies and photographers, lured by its alien-like landscape. Depending on wind conditions and mineral disturbances in the water, the lake’s ethereal colour oscillates between shades of turquoise and deep green.
The lake’s toxicity stems from natural geological processes. Beneath Licancabur, volcanic activity has resulted in mineral-rich deposits leaking into the lake, forming a deadly mix of arsenic, lead, and sulphur, reports the Daily Star.
These harmful elements inhibit the growth of any substantial aquatic life. Even birds, commonly seen wading in Andean lakes, steer clear of Laguna Verde’s waters.
Scientists have been studying the lake’s harsh environment to gain insights into how life could survive in similar conditions elsewhere, such as on Mars.
The region’s extreme climate, high UV radiation and unique chemical composition offer invaluable knowledge for astrobiologists researching alien environments.
Despite Laguna Verde’s dangers, it continues to attract travellers who journey through Bolivia’s remote Altiplano region to marvel at its captivating colours.
Visitors are urged to appreciate the lake from a safe distance as contact with the water can be dangerous. The high altitude also presents risks, with many tourists suffering from altitude sickness if they’re not properly acclimatised.
Bolivia is a land of towering heights, holding the title for the highest country in South America and boasting the world’s highest capital city, La Paz, with about a third of the nation nestled within the Andes Mountains.
Licancabur Volcano, straddling the Bolivia-Chile border, is topped by a 400-500 metre wide summit crater. It’s considered potentially active, but SERNAGEOMIN rates it as low-risk and ranked it as the 68th most dangerous volcano in Chile in 2023.