Interesting facts Couple spends 20 years digging a hillside in California to escape heat, cold, and fires, creates a maze of underground houses with tunnels, domes, and illuminated patios, and transforms buried dwelling into an artisanal ecovillage. Ana Alice 18/06/2026 at 22:20
Interesting facts Indianapolis “swallows” up to 250 million gallons of sewage and rain: underground tunnels capture overflows and take everything to treatment. Alisson Ficher 05/06/2026 at 23:45
Science and Technology Scientists pour 10 tons of cement into an abandoned anthill in Brazil and reveal an “underground city” with tunnels, chambers, and ventilation built by millions of ants. Ana Alice 11/05/2026 at 23:56
Interesting facts With 46,000 Hand-Dug Underground Water Tunnels Built Over 3,000 Years, Spanning Up to 350,000 Km Driven Solely by Gravity, Iran Made the Desert Bloom Until Deep Wells and Modern Dams Accelerated a Devastating Water Crisis Maria Heloisa Barbosa Borges 12/02/2026 at 19:03
Construction To Build The Largest Underground Metro In The Middle East, Saudi Arabia Dug More Than 176 Km Of Tunnels, Bored Through Rock And Sand With Shielded TBMs, Opened Stations Up To 40 Meters Deep, And Redesigned Entire Foundations Under The Capital Débora Araújo 14/01/2026 at 18:49
