1st class of <a href="https://en.wikipedia.org/wiki/Triangulation_station" class="extiw" title="en:Triangulation station">triangulation point</a> in Japan.
<a href="//commons.wikimedia.org/w/index.php?title=User:Modeha&amp;action=edit&amp;redlink=1" class="new" title="User:Modeha (page does not exist)">Modeha</a>
CC BY 1.0
<span class="int-own-work" lang="en">Own work</span>