A <a href="//commons.wikimedia.org/w/index.php?title=Giants_kettle&amp;action=edit&amp;redlink=1" class="new" title="Giants kettle (page does not exist)">giants kettle</a> (a pothole) in <a href="//commons.wikimedia.org/wiki/Helsinki" class="mw-redirect" title="Helsinki">Helsinki</a>, <a href="//commons.wikimedia.org/wiki/Finland" class="mw-redirect" title="Finland">Finland</a>. This giants kettle is the bigger of the two located in the middle of <a href="//commons.wikimedia.org/w/index.php?title=Pihlajam%C3%A4ki&amp;action=edit&amp;redlink=1" class="new" title="Pihlajamäki (page does not exist)">Pihlajamäki</a> residential area. The diameter of the hole is 6.9 metres (22.6 ft) and the depth is 8.45 metres (27.72 ft). The estimated age of the pothole is between 50,000 and 100,000 years. It is grinded before the last <a href="//commons.wikimedia.org/w/index.php?title=Ice_age&amp;action=edit&amp;redlink=1" class="new" title="Ice age (page does not exist)">ice age</a>, since it was found in geological formations under the ones created by the last ice age. It is estimated it took less than 100 years to grind this pothole in a current covered by 500–1,000 metres (1,600–3,300 ft) of ice. The age of the <a href="//commons.wikimedia.org/w/index.php?title=Bedrock&amp;action=edit&amp;redlink=1" class="new" title="Bedrock (page does not exist)">bedrock</a> is approx. 1.9 billions (1,900,000,000) years.
<a href="//commons.wikimedia.org/wiki/User:P%C3%B6ll%C3%B6" title="User:Pöllö">Pöllö</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>