World’s longest and most expensive railway tunnel, Gotthard Base Tunnel ZURICH — The world’s longest and most expensive railway tunnel opens on Wednesday in Switzerland. The Gotthard Base Tunnel originates in Erstfeld in the canton of Uri and ends in Bodio in the canton of Tessin. Facebook Prev Article Next Article Engineering Checkout these cool gadgets... Related Posts Hubble Memorable Moments: Tinkertoy Solution Watching what happens inside of next-generation batteries, causing fires Biomimicry – The world is poorly designed. But copying nature helps. Futuristic TriFan 600 Can Take Off Vertically Like a Helicopter HydroBee – Your Personal Hydroelectric Generator 3 Ton Power Hammer – Would You Work Here?