A boat made out of a single wooden log. Late 19th century, Ukraine.
<a href="//commons.wikimedia.org/w/index.php?title=User:%D0%AE%D1%80%D0%B8%D0%B9_%D0%A0%D1%83%D0%B4%D0%BD%D0%B8%D1%86%D0%BA%D0%B8%D0%B9&amp;action=edit&amp;redlink=1" class="new" title="User:Юрий Рудницкий (page does not exist)">Юрий Рудницкий</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>