OK so when you drive on a bridge over water you roll down a window. So what do you do if you drive on a bridge under water?Amazing Engineering - This bridge connects Denmark and Sweden. The made part of the path go underwater to let ships pass.
The Öresund or Øresund Bridge (Danish: Øresundsbroen, Swedish: Öresundsbron, joint hybrid name: Øresundsbron) is a double-track railway and dual carriageway bridge-tunnel across the Øresund strait between Scania (southernmost Sweden) and Denmark.
Millau Bridge in southern France ~ 'Le Viaduc de Millau' ~ cable-stayed bridge, crosses Valley of the River Tarn ~ "the tallest bridge in the world with one mast's summit at 343 m. ft) above the base. (and) the highest bridge deck in the world"