Gångtunnel under motorvägen vid Vltavas strand i Prag.
Johan Jönsson (<a href="//commons.wikimedia.org/wiki/User:Julle" title="User:Julle">Julle</a>)
CC BY-SA 4.0
<p><span class="int-own-work" lang="en">Own work</span>
Source (where the image was first published): <a rel="nofollow" class="external free" href="https://www.instagram.com/gakannjan">https://www.instagram.com/gakannjan</a> 
</p>
This is the Instagram account of the uploader.