Londoners might think waiting five minutes for the tube is pushing it, but in one city in China, commuters face a rather ...

Kiev's three lines cut across the city, serving its almost three million residents, and the system is home to what is claimed to be the world's deepest subway station, almost 350 feet below street ...

The metro is 360 feet below ground, making it one of the deepest subway systems in the world. Some of the stations are so deep, they double as bomb shelters that are protected with heavy blast doors.