Baikal is the world's deepest and oldest freshwater lake, located in Siberia, Russia. It reaches a maximum depth of about 1,642 meters (5,387 feet) and is estimated to be around 25 million years old. The lake holds approximately 20% of the world's unfrozen freshwater, making it a vital natural resource. The surrounding area is home to diverse wildlife, including the unique Baikal seal, which is found nowhere else in the world. Baikal is also a UNESCO World Heritage Site, recognized for its stunning landscapes and rich biodiversity, attracting researchers and tourists alike.