Map shows UK's busiest motorway with new tunnel underneath airport runway
The M25 could be diverted through a tunnel under Heathrow's third runway as part of the airport's expansion plans. Here's how ...
Leonardo da Vinci's secret underground tunnels discovered after 500 years
A series of underground passages have been found under Sforza Castle in Milan by experts at the city's Polytechnic University ...
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 below the streets of the capital, the Kingsway Exchange Tunnels were built ...
Heathrow third runway: map reveals proposed location and expansion impact
A section of the M25 runs through the proposed site, meaning the motorway could be rerouted through a new tunnel if the project moves forward ...