When Sweden and Denmark built a connection between their countries, Sweden preferred a bridge, and Denmark preferred a tunnel, they each built their half and connected them in the middle with an artificial island. The Øresund Bridge is unique in the world.
you are both right
Yes, I didn’t say they didn’t do anything, I only said “there’s an island and the waters are shallow”:)
But it’s generally cheaper to dig and cover, thatn to build in the air.