Limestone for building the (dairy)manor to the Kesselaid (island in Estonia) were taken just some meters away from the manor itself. This hole, that was created during taking the stones for building the manor, shows the sobsoil of the island (that mainly consists of limestone).
<a href="//commons.wikimedia.org/wiki/User:Kruusam%C3%A4gi" title="User:Kruusamägi">Ivo Kruusamägi</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>