Forest library photo taken by 구순돌(gusundol)
<a href="//commons.wikimedia.org/wiki/User:%EA%B5%AC%EC%88%9C%EB%8F%8C" title="User:구순돌">구순돌</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>