Phytoliths are microscopic silica particles produced by plants that can be easily fossilized and preserved in millions-of-year-old sediments and soils. We test the hypothesis that phytoliths found in the soil of a Savanna in Colombia reflect the surrounding local vegetation. If our hypothesis is correct we can use phytolith analysis for detailed reconstructions of past landscape in order to better understand relationships between past biodiversity, ecosystems, and climate.