The American Niagara Falls, with a rainbow and one of the Maid of the Mist boats.
Benjamin D. Esham (<a href="//commons.wikimedia.org/wiki/User:Bdesham" title="User:Bdesham">bdesham</a>)
CC BY-SA 4.0
Taken by <a href="//commons.wikimedia.org/wiki/User:Bdesham" title="User:Bdesham">bdesham</a> with a Canon PowerShot S3.  <br><br><span style="color:#0063DB; font-weight:bold">●</span><span style="color:#FF0084; font-weight:bold">●</span>  From <a rel="nofollow" class="external text" href="http://www.flickr.com/photos/bdesham/1128615583">Flickr</a>.