Blue Lake Cave, Natural cave system with underground lake in Bonito, Brazil
Blue Lake Cave is a natural monument featuring an underground cave system with a deep subterranean lake surrounded by white limestone walls. The central chamber extends into the darkness, creating a remarkable natural space where water and rock formations meet.
The cave system formed over millions of years as water carved through limestone, creating the underground passages and lake. Archaeological findings near the cave reveal that ancient animals once inhabited the region during different climate periods.
The Brazilian government designated this cave system as a Natural Monument in 1978 through the National Institute of Historic and Artistic Heritage.
Entry to the cave is only possible with certified guides who maintain conservation standards during the visit. Tours are available year-round, though certain seasons offer different viewing conditions and experiences.
From September to February, sunlight streaming through the cave entrance creates an intense blue glow on the underground water. This natural light display is what gives the lake its distinctive name and makes these months especially striking to witness.
Location: Mato Grosso do Sul
Inception: 2001
GPS coordinates: -21.14470,-56.59150
Latest update: December 6, 2025 17:42
Brazil features natural areas and local sites beyond major cities. The landscape spans from waterfalls and caves to coastal regions and mountains. National parks contain sand formations, lagoons, and coral reefs. Cultural places include traditional villages and historical sites.
The central west region of Brazil encompasses states including Goiás, Mato Grosso and Mato Grosso do Sul. These areas contain national parks with hiking trails, waterfalls and cave systems. Chapada dos Veadeiros National Park near Alto Paraíso de Goiás displays cerrado vegetation and rock formations. Bonito offers clear rivers for snorkeling, while Pirenópolis combines colonial architecture with nearby nature reserves. Terra Ronca State Park contains underground rivers and limestone caves. The Pantanal area spans Mato Grosso and hosts various wildlife species. Chapada dos Guimarães near Cuiabá shows sandstone formations and viewpoints over the surrounding plains. The Jalapão region in Tocantins features dune landscapes and natural springs. These locations draw hikers, cave explorers and travelers looking to experience remote natural areas.
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