Secret tunnels & hidden water supplies! Building a sustainable future: Part 2

With water restrictions in place due to the drought we start to unlock Purnon’s enormous underground water supplies and discover the domain’s mysterious vast

The Qanat System: A Reflection on the Heritage of the Extraction of Hidden Waters

Beyond the Basics: Exploring the Advanced Applications of DFOS in Tunnel Monitoring

37 Underground Cities: The Hidden Pillars of Civilization

Secret tunnels & hidden water supplies! Building a sustainable future: Part 2

Prague uncovered: Emperor Rudolf II's tunnel brings the Vltava to Stromovka - Prague, Czech Republic

The Return of Glen Canyon - Atlas Obscura

Future Cities Live Underground—And That's Not a Pile of Schist – The Nature of Cities

Secret tunnels & hidden water supplies!

The Key to California's Survival Is Hidden Underground

A History of the Urban Underground Tunnel (4000 B.C.E. - 1900 C.E.)