The Oresund Tunnel is a combined road and rail tunnel that connects Copenhagen, Denmark, to Malmö, Sweden. It is part of the larger Oresund Link project, which also includes a bridge. The tunnel is approximately 4 kilometers long and runs beneath the Oresund Strait, allowing for efficient transportation between the two countries. Opened in 2000, the Oresund Tunnel plays a crucial role in facilitating trade and travel in the region. It accommodates both cars and trains, making it a vital infrastructure component for commuters and tourists alike. The tunnel enhances connectivity and promotes economic growth in Scandinavia.