A motorbike track that has been created in Crofton Woods by digging out soil and piling it up into a series of undulations for bikes to ride over. This seems to be an illegal development created by motorcycle enthusiasts as bikes of all kinds are prohibited from being brought into the wood.
<a href="//commons.wikimedia.org/wiki/User:Ethan_Doyle_White" class="mw-redirect" title="User:Ethan Doyle White">Ethan Doyle White</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>