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Europe is home to a number of mega-cities , whether it's London, Berlin or Athens, each have insanely big populations and ...

Explore the Paris Catacombs tunnels is ranked #23 out of 34 things to do in Paris. See pictures and our review of Explore the Paris Catacombs tunnels.

The history of the Paris catacombs, the city's underground tunnels of death home to over 6 million corpses.

Eurostar services to and from London were canceled Saturday after a tunnel under the River Thames became flooded, disrupting festive travel plans. Hundreds of travelers trying to get across the ...

The Grand Paris Express will add four lines, 68 stations and 200 kilometers of track to the French capital’s 120-year-old Metro system.