Saturn’s moon Titan has some lakes that are strangely shaped and appear to have formed from explosions of underground nitrogen hundreds of millions of years ago
Source:
https://www.newscientist.com/article/2215702-titans-odd-shaped-lakes-may-have-formed-from-underground-explosions/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home