Any paintings of dark nature?
Have a look at works of Caspar David Friedrich, his works can be rather somber in nature, and he painted many dark mountain paintings, here is the link http://www.artisoo.com/shop-by-artist-caspar-david-friedrich-c-66_156_965.html.
For what? ... and yes there totally are.
i cant think of any particular artistsmaby vangohs starry night
"The Scream," by Edvard Munch, which many people associate with going insane. The painting sold for almost $200,000,000.00 dollars, and people think Van Gogh was the painter. That's right, almost $200 million dollars!