Abandoned Engineering: Britain's Sea Fort Complex

SYNOPSIS

The Red Sands Sea Fort was originally built to protect London from the Nazi threat in 1945. Massive engineering for the time, seven steel boxes rise 80-feet out of the water at the mouth of the River Thames. Also investigated a 4,000 tonne rusted mass of steel in a field in Eastern Germany, an empty complex located in Philadelphia, and in North Dakota a sinister looking concrete pyramid dating back to the Cold War.