The entrance to the <i>tunnels des halles</i> in Strasbourg. The left tunnel went to Place Klèber, and on half way had an underground access to parking and delivery of the shopping mall.
<a href="//commons.wikimedia.org/wiki/User:Ikar.us" title="User:Ikar.us">Michael Kauffmann</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>