see, I was afraid it was too easy for smart people like you, unc! But I'm glad I'm there since there are just so many superlatives to this place:
the world's oldest lake ~25 million years old making it one of the most ancient lakes in geological history
the world's deepest lake ~5400 ft
The bottom of the lake is 1,186.5 metres (3,893 ft) below sea level, but below this lies some 7 km (4.3 mi) of sediment, placing the rift floor some 8–11 kilometres (5.0–6.8 mi) below the surface: the deepest continental rift on Earth.
2nd most voluminous lake in the world
most voluminous fresh water lake in the world
largest surface area of any freshwater lake in Asia
contains about 20% of the world's surface fresh water
It is one of the clearest lakes in the world
Baikal is home to more than 1,700 species of plants and animals, two thirds of which can be found nowhere else in the world.
Known as the "Galápagos of Russia", its age and isolation have produced some of the world's richest and most unusual freshwater fauna.
It contains 27 islands; the largest, Olkhon, is 72 km (45 mi) long and is the third-largest lake-bound island in the world.
Despite its great depth, the lake's waters are well-mixed and well-oxygenated throughout the water column.
Lake Baikal - Wikipedia, the free encyclopedia
You're up, unc.