A terrifying sea fortress, a highway in the Amazon that suddenly vanishes, and a mysterious structure in the shadow of the Statue of Liberty are deserted engineering projects; discoveries reveal how they were built and why they were abandoned.
Stories:
1) Petrobras Viaduct, São Sebastião, Brazil;
2) Patarei Prison, Tallinn, Estonia;
3) Ellis Island, New York Bay, USA;
4) Ouvrage Restefond, Col de la Bonnette, France
