London's secret tunnels to open as new tourist attraction with the UK's deepest bar
A sprawling network of secret underground tunnels is being transformed into a major new London tourist attraction. Hidden 40m ...
Daily Galaxy on MSN4h
Leonardo da Vinci’s Forgotten Sketch Leads to the Discovery of Secret Tunnels Beneath an Italian Castle
A 500-year-old sketch by Leonardo da Vinci has led to the remarkable discovery of hidden tunnels beneath Sforza Castle in Milan, Italy. The revelation confirms that da Vinci’s detailed architectural ...