Subterranea :
Metro , Tunnels , Caves , Underground cities , Caving
Metro :
Metros in Asia , Metros in Europe , Metros in North America , Metros in South America , Subways
Tunnels :
Tunnels in Switzerland , Toll tunnels , Tunnels in Norway , Tunnels in the United Kingdom , Tunnels in Hong Kong , Tunnels in Australia , Tunnels in Germany , Tunnels in Ireland , Tunnels in Canada , Railway tunnels
Caves :
Caves in Australia , Caves in the United States , Caves in the United Kingdom , Caves in New Zealand , Caves in Italy , Caves in Hungary
Metros in Asia :
Mass Rapid Transit (Singapore) , Seoul subway lines , MTR , Light Rapid Transit (Singapore) , KCR , Shanghai Metro , Metros in Japan , Metros in India
Metros in Europe :
Paris metro , S-Bahn in Germany , London Underground , U-Bahn in Germany , Oslo T-bane , Paris RER , Moscow metro
Metros in North America :
Mexico City metro stations , Toronto TTC , Montreal Metro , Rapid transit in the United States
MTR :
MTR lines , MTR stations , MTR Corporation Limited
Toronto TTC :
Yonge-University-Spadina Line Stations , Bloor-Danforth Line Stations , TTC Yards, Garages and Facilities
Montreal Metro :
Montreal metro artists , Montreal Metro Green Line , Montreal Metro Orange Line , Montreal Metro Yellow Line , Montreal Metro Blue Line
Rapid transit in the United States :
New York City Subway , Washington Metro , SEPTA , PATCO Speedline , Red Line (MBTA) , Orange Line (MBTA) , Blue Line (MBTA) , Los Angeles County Metro Rail , Bay Area Rapid Transit , San Francisco Municipal Railway , Port Authority Trans-Hudson
New York City Subway :
New York City Subway history , New York City Subway passenger equipment , New York City Subway stations , New York City Subway lines , New York City Subway services
New York City Subway stations : Abandoned New York City Subway stations , IRT Eastern Parkway Line stations , IRT Lexington Avenue Line stations , IRT Flushing Line stations , IND Eighth Avenue Line stations , BMT Fourth Avenue Line stations , IRT 42nd Street Shuttle stations , IRT Broadway-Seventh Avenue Line stations , BMT Broadway Line stations , IND Crosstown Line stations