Drive-Thru Mailbox at Dortmund central station
<a href="//commons.wikimedia.org/wiki/User:Raenmaen" title="User:Raenmaen">Raenmaen</a>
CC BY 3.0
<a href="//commons.wikimedia.org/wiki/File:Dortmund_HBF_Autobriefkasten.jpg" title="File:Dortmund HBF Autobriefkasten.jpg">File:Dortmund HBF Autobriefkasten.jpg</a>