The Øresund Bridge connects Copenhagen, Denmark to Malmö, Sweden with a nearly 8 km cable-stayed bridge that transitions to a 4 km tunnel on an artificial island. The double-track railway and motorway opened in 2000 and has received awards for its engineering marvel of a bridge turning into an underwater tunnel.

1. This Amazing Bridge Turns Into a
Tunnel and Connects Denmark
and Sweden

2. The Øresund is an engineering marvel that connects the Danish capital
of Copenhagen to the Swedish city of Malmö.
A cable-stayed bridge runs nearly 8 km (5 miles) to an artificial island
where it transitions into a tunnel that runs another 4 km (2.5 miles).
The award-winning double-track railway and motorway opened on July
1, 2000.