Watch Them Build an Entire Tunnel Inside a Mountain

For centuries, crossing the majestic Alps meant battling treacherous mountain passes and unpredictable weather. But Switzerland had a radical vision: stop climbing the mountains, and drill straight through their base. In this episode of MegaTV, we take an inside look at the engineering marvel behind the Gotthard Base Tunnel—the longest underground railway tunnel in the world. Spanning nearly 57 kilometers, this mega project required massive tunnel boring machines acting as industrial giants to crush Alpine rock millimeter by millimeter. From stabilizing unpredictable geology with shotcrete to aligning twin tubes with absolute millimeter-precision, discover the staggering complexity hidden beneath the scenic mountains. 📌 Timestamps: 00:00 - The Impossible Mountain Barrier 00:48 - Precision Alignment From the Start 01:28 - Assembling the Industrial Giants Underground 02:40 - Inside the Harshest Tunneling Environment 04:32 - Concrete Linings & Advanced Railway Tracks 05:28 - The Breakthrough Moment 05:52 - Testing & Final Infrastructure Integration If you love engineering breakdowns, don't forget to LIKE, SHARE, and SUBSCRIBE to MegaTV for more megastructure documentaries! #megatv #megastructures #GotthardBaseTunnel #CivilEngineering #tunnelconstruction