An underground railway that was formerly used to transport post across London is to be converted into a ride for members of the public. The Post Office Underground Railway -- AKA the Mail Rail -- was ...

LONDON — In 1913, the British Post Office realized that London’s congested traffic was slowing down mail delivery and something needed to be done about it. That year, Parliament approved building the ...

The London Underground is famous - but this traveller took a peek into the city's lesser-known and largely forgotten underground rail network. The underground rail tunnels shuttled letters and parcels ...

Extra subway lines below New York City, tunnels winding underneath England, and abandoned metro lines make our list of the best hidden transportation locations. Tim Newcomb covers infrastructure and ...