Manhole

Manholes, covered by manhole covers, were found in London. (TV: The Dalek Invasion of Earth)

Behind the scenes

 * In the video game The Last Dalek, based on the events of Dalek, uncovered manholes appear as obstacles in Geocomtex, which the Metaltron overcomes by equipping an anti-gravity device.
 * In the video game Daleks v Cybermen, based on the events of Doomsday, manholes appear as hazards throughout London during the Battle of Canary Wharf.