But much to the surprise of the scientists, a second secret tunnel which experts had only hypothesised about for a few years was discovered. This second tunnel runs parallel to the first one ...

When the Wynyard tunnels – abandoned railway tunnels connecting to Wynyard Station in Sydney’s CBD – first came alive with lights and immersive sound displays as part of Vivid, Sydneysiders ...

When Spanish Civil Guard officers descended into an abandoned warehouse in Ceuta’s Tarajal district on February 19, they uncovered what officials had long suspected: a sophisticated underground tunnel ...

A team at the Polytechnic University of Milan uncovered secret tunnels beneath Sforza Castle, potentially linked to Leonardo da Vinci's designs. Scientists have uncovered hidden structures ...

But to the researchers’ surprise, their survey revealed a second secret tunnel that experts had only hypothesized about for years. The second tunnel runs parallel to the first one, about 1 meter ...

London (CNN) — From Narnia to Alice in Wonderland, Britain’s best adventures begin with hidden doors or secret tunnels — and this is a tale with both. Behind an unmarked blue door in London ...