Suvarnabhumi International Airport (Thailand), escalators within the restricted area between the 4<sup>th</sup> and 3<sup>rd</sup> floor in the concourse building ("B"?).
<a href="//commons.wikimedia.org/wiki/User:Mattes" title="User:Mattes">User:Mattes</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>