The blocked-off entrance to the Selby Hill Tunnel, which carried streetcars up Selby Avenue at a lower grade.  Once a photogenic spot of St. Paul, it's all overgrown now.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/28496375@N00">Michael Hicks</a> from Saint Paul, MN, USA
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/mulad/143855132/">Selby Hill Tunnel</a>