The Eternal Flame is in Mars Field and was designed by the Soviets in memory of WWII victims. It was lit on the 40th anniversary of the revolution.
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/77846644@N00">Jennifer Boyer</a>
CC BY 2.0
originally posted to <b><a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a></b> as <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/77846644@N00/52473959">Eternal Flame</a>