A diagram of solstice and equinox sunset and sunrise positions at the location of <a href="https://en.wikipedia.org/wiki/Mound_72" class="extiw" title="en:Mound 72">Mound 72</a> and Mound 96 <a href="https://en.wikipedia.org/wiki/Cahokia" class="extiw" title="en:Cahokia">Cahokia Mounds</a> site near <a href="https://en.wikipedia.org/wiki/Collinsville,_Illinois" class="extiw" title="en:Collinsville, Illinois">Collinsville, Illinois</a>, USA.
<a href="//commons.wikimedia.org/wiki/User:Heironymous_Rowe" title="User:Heironymous Rowe">Heironymous Rowe</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>