Long exposure waterfall photo from Ricketts Glen State Park, Pennsylvania, USA. Variant of this image digitally manipulated with purple monochrome space image of the Carina Nebula.
Special thanks to ESA/Hubble for generously providing the beautiful space image under a Creative Commons license, more specifically: NASA, ESA, N. Smith (University of California, Berkeley), and the Hubble Heritage Team (STScl/AURA).