Subway Facts

Scientists found that 15% of matter in the air at subway stations is human skin, from areas such as heels, belly buttons, armpits, and rear ends.

Passengers on the Beijing subway can pay with plastic bottles.

In major cities like Brooklyn and London, there are fake townhouses that hide subterranean chimney vents, emergency subway exits, and more. Camouflaged in plain sight, they normally go unnoticed within their architectural surroundings.

NYC's Metropolitan Transit Authority (MTA) dumps old subway cars into the ocean to serve as artificial reef.

Five train cars passed over Wesley Autrey while he shielded a stranger on the subway tracks. His two daughters, ages 4 and 6, watched from the platform. From under the train he shouted: "Let my daughters know their father's okay."

The U.S. Capitol has run its own private underground subway since March 1909. The original cars were lemon-yellow Studebakers that held eight senators and took just 45 seconds to cover a 760-foot tunnel. It still runs today - and the public cannot get on without a congressional escort.