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# It Looks Like a Desert. But It Has Thousands of Lakes
- URL: https://www.cascadepbs.org/show/untold-earth/episode/it-looks-like-a-desert-but-it-has-thousands-of-lakes-phwxhi/
- Published: 2025-11-07T18:30:51.000Z
- Updated: 2025-11-09T06:30:21.000Z
- Description: Lençóis Maranhenses boasts 350 square miles of dunes that fill crystal blue with lagoons each year.
- Author: Cascade PBS Staff
- Tags: Untold Earth, Season 2, Episode 10, #ZZZ_Episode_f2c7e0bf-2192-4122-b382-de8ad4c099db, #episode, #ZZZ_Show_53bb3bef-6200-4947-a257-d3385486b9a0, #v1.16

Lençóis Maranhenses sits at the intersection of three biomes—a rare overlap that supercharges biodiversity. Across 350 square miles of dunes, the rainy season brings thousands of crystal blue lagoons into view, many big enough to swim in. What makes this surreal environment possible? And why, even after 2 million years in existence, does it still feel so mysterious?