Cyber-Tombs

Characteristics
The Tombs were small regtancular shaped rooms with pictures of Cybermen heads on the front wall. The Cyber-Control (Mondasian) tomb was a door with hinges instead of a weak subtanse like the other Cybermen.

Usage
The use of the tombs were to hold dead Cybermen. The tombs were really used when a great sickness killed of all the Cybermen. This sickness and and a group of people and The Doctor, Jamie, and Victoria ( DW: The Tomb of the Cybermen ).

Cyberman are immune to diseases and viruses. The reason they locked themselves into tombs was because they were running out of power to revitalise themselves.