Photo: Massive Prehistoric Fort Emerges From Welsh Woods

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Buried by lush forests (top), the Gaer Fawr fortress in Wales has been reconstructed (bottom) using manual surveying and computer analysis.

The massive Iron Age structure was likely occupied between from about 900 B.C. until the Roman invasion of Britain in A.D. 43.

Image by Crown Copyright RCAHMW, Image copyright Geoperspectives. Copyright Landmark Information Group Ltd.

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