There's a lake under Antarctica that is 25 million years old called Lake Vostok.
Longest officially recognized place name is Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu.
The Caspian Sea is also classed as the world's largest lake.
The water of the Antarctica is so cold that nothing can rot there.
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere