The deepest depths of Lake Erie are still at a higher elevation than the surface of Lake Ontario. The two lakes are only separated by about 21 miles (34 kilometers).
27. Lake Peigneur became the deepest lake in Lousiana in 1980 after the Gulf Of Mexico flowed into it as a result of Texaco employees accidentally flushing the entire lake like a toilet into the salt mine beneath it.
28. Lake Vostok, in Antarctica, is the 16th largest lake in the world. The lake water itself has been isolated for upwards of 15 million years, sealed off by a sheet of ice.
29. A turquoise lake in Siberia is nicknamed the "Novosibirsk Maldives" because of how tropical it looks. Popular with Instagrammers, it is actually a power plant's ash dump, and the lake gets its distinct color from calcium salts and other metal oxides. The water in the lake is actually toxic and it is dangerous to swim in it.
30. Summersville Lake is the largest lake in West Virginia. It was constructed in the early 1960s when the Gauley River was dammed at the village of Gad (which is now under its waters) but the powers that be decided not to name it the Gad Dam.