The Gotthard Base Tunnel is a remarkable railway tunnel in Switzerland, stretching about 57 kilometers (35 miles) beneath the Alps. It connects the towns of Erstfeld in the north and Bodio in the south, making it the longest railway tunnel in the world. Opened in 2016, the tunnel significantly reduces travel time for trains crossing the mountainous region, enhancing both passenger and freight transport. This engineering marvel took nearly two decades to complete and involved thousands of workers. The Gotthard Base Tunnel is part of a larger project to improve the European rail network, promoting sustainable transport and reducing road traffic in the Alps.