A secret structure on a sinister mountain, an industrial compound swallowed by a forest, and a mysterious run in a sand dune are strange deserted engineering projects.
Stories:
1) Tuefelsberg Listening Station, Berlin, Germany;
2) Phoenix Shot Tower, Baltimore, USA;
3) Politz Synthetic Oil Refinery, Police, Poland;
4) Rubjerg Knude Lighthouse, Jutland, Denmark
