This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
photomatix topaz adjust detail niagara falls hdr xp nik color efex nikcolorefex horseshoe maid mist landscape waterfall water wave sea outdoor ocean shot HDR tonemapped in Photomatix then processed with Topaz Adjust and Detail. shot HDR tonemapped in Photomatix then processed with Topaz Adjust and Detail.