Gotthard Base Tunnel Switzerland

Once completed in 2016, the Gotthard Base Tunnel will be the longest railway tunnel in the world. The 35 mile tunnel cuts under the Swiss Alps at 8,000 feet below sea level and is expected to reduce travel time between Zurich and Milan by about an hour. The building of the tunnel was an arduous feat as eight lives were lost during the process. For an up close look at the construction, the public can visit a multimedia exhibition for free or take a tour of a construction site along the tunnel.