You are not hallucinating. This river is truly of emerald green color. This absent-colored river is running in Goldstream Park, Canada. Its waters turned neon green on December 29, 2010. According to the local Environment Ministry, there was a chemical reaction in the water known as “fluorescein”. But people believed that somebody dumped fluorescein in the Goldstream River to make a holiday season joke, but that substance wasn’t toxic and fish along with the habitat weren’t affected.