Talk:Lost River/@comment-25135157-20160410140103/@comment-27041282-20160410143742

It's not just water, but some kind of acidic brine or something like that. Underwater "lakes" or "rivers" actually exists in real life. They often consist of brine that forms a surface layer because it's denser than the surrounding water. Have a look!

http://www.cracked.com/article_19557_the-5-most-mind-blowing-things-that-can-be-found-underwater.html