360 million years old Granodiorite with 100 different species of mosses as a monument to <a href="https://en.wikipedia.org/wiki/Christian_Leopold_von_Buch" class="extiw" title="en:Christian Leopold von Buch">Leopold von Buch</a>.
<a href="//commons.wikimedia.org/wiki/User:Haeferl" title="User:Haeferl">Haeferl</a>
<span class="int-own-work" lang="en">Own work</span>