<a href="https://en.wikipedia.org/wiki/pictogram" class="extiw" title="w:pictogram">pictograms</a> used by the <a href="//commons.wikimedia.org/wiki/United_States" title="United States">United States</a> <a href="https://en.wikipedia.org/wiki/National_Park_Service" class="extiw" title="w:National Park Service">National Park Service</a>.  A package containing all NPS symbols is available at the <a rel="nofollow" class="external text" href="http://openiconlibrary.sourceforge.net/">Open Icon Library</a>
NPS Graphics, converted by <a href="//commons.wikimedia.org/wiki/User:ZyMOS" title="User:ZyMOS">ZyMOS</a>
Originally created July 2006, converted Jan 2010
<a rel="nofollow" class="external free" href="http://www.nps.gov/hfc/carto/map-symbols.htm">http://www.nps.gov/hfc/carto/map-symbols.htm</a>, Converted from PDF to SVG for the <a rel="nofollow" class="external text" href="http://openiconlibrary.sourceforge.net/">Open Icon Library</a>