The elaborate underground works of the colosseum are exposed for you to see in this picture. It was an underground network of cages, rooms and passageways for people and animals.
Interior of the Colosseum showing the hypogeum
From Martha Bakerjian, About.com
Roman Colosseum Picture: The interior of the Colosseum showing the floor.
Colosseum Picture © 2006 by James Martin, Europe for Visitors©2009 About.com, a part of The New York Times Company.
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