The hollow bole of the leaveless old <a href="https://en.wikipedia.org/wiki/de:Kasberger_Linde" class="extiw" title="w:de:Kasberger Linde">Kasberg lime tree</a> (Kasberg is a small village near <a href="https://en.wikipedia.org/wiki/Gr%C3%A4fenberg,_Bavaria" class="extiw" title="w:Gräfenberg, Bavaria">Gräfenberg</a>, Germany) in spring 2007. The tree is believed to be thousand years old. The bole is mostly rotten so the tree isn't stable on its own.
<a href="//commons.wikimedia.org/wiki/User:Arnomane" title="User:Arnomane">Daniel Arnold</a>
CC BY 2.5
own photo taken by <a href="//commons.wikimedia.org/wiki/User:Arnomane" title="User:Arnomane">Daniel Arnold</a>