What is the Channel Tunnel?

What is the Channel Tunnel?

The Channel Tunnel (also known as “The Chunnel”) consists of 3 interconnecting tubes: a rail track for travel in each direction and one service tunnel. The length of the tunnel is 31 miles long, but only 23 miles are underwater. The average depth is 150 feet under the seabed. The Eurostar only spends 20 minutes of its journey in the tunnel.