Frank Lloyd Wright signature at Kentuck Knob.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/95118988@N00">Jeff Kubina</a> from Columbia, Maryland
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/95118988@N00/2090586891/">Frank Lloyd Wright Signature</a>