Gov. Gavin Newsom is pushing to build a 45-mile water tunnel in California’s Delta. A new state report says the proposal is the “single most effective” action to adapt the state’s water system to ...

Elon Musk's Boring Company will build a privately funded high-speed tunnel, the Music City Loop, connecting Nashville International Airport to downtown. The 10-mile tunnel aims to reduce commute times ...

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Building a tunnel across the Bering Strait, from Russia to Alaska, is an idea that’s been around since at least the 1950s. And the Kremlin apparently thinks it’s good enough to revive, if the CEO of ...