Ice balls look like onions. The lake <a href="https://en.wikipedia.org/wiki/P%C3%A4tzer_Vordersee" class="extiw" title="en:Pätzer Vordersee">Pätzer Vordersee</a> in <a href="https://en.wikipedia.org/wiki/Bestensee" class="extiw" title="en:Bestensee">Bestensee</a>, <a href="https://en.wikipedia.org/wiki/Germany" class="extiw" title="en:Germany">Germany</a>.
<a href="//commons.wikimedia.org/wiki/User:V.Boldychev" title="User:V.Boldychev">V.Boldychev</a>
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<span class="int-own-work" lang="en">Own work</span>