Inside the lab that tests elevator free-falls – we sent Fred down the world's deepest elevator test shaft in Tytyri, Finland
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The insane scale of Europe's new mega-tunnel – Denmark is building a record-breaking tunnel to Germany
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Gothenburg is on a $100bn building spree
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Inside the first undersea roundabout – one of the world's most remote construction projects can be found on the Faroe Islands
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The new $45 billion metro system under construction beneath Paris
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