Mental Floss

WATER

Vienna’s Wienflussportal, showing the spot where the Vienna River emerges from its underground course.

Discover the hidden rivers buried beneath cities around the world. From Moscow to Tokyo, explore the history and modern efforts to reopen these forgotten waterways.

Julie Fogerson
Atmospheric rivers slammed Southern California in February 2024 and caused widespread floods and mudslides.

Explore the role of these weather systems in transporting moisture from the tropics and spreading it worldwide.

Dennis Mersereau