An underground city is a series of linked subterranean spaces that may provide a defensive refuge; a place for living, working or shopping; a transit system; mausolea; wine or storage cellars; cisterns or drainage channels; or several of these. Underground cities may be currently active modern creations or they may be historic including ancient sites, some of which may be all or partially open to the public.
MetroLink is a light rail system that serves the Greater St. Louis area. Operated by Metro Transit in a shared fare system with MetroBus, the two-line, 38-station system runs from St. Louis Lambert International Airport and Shrewsbury in Missouri to Scott Air Force Base in Illinois. Intermediate destinations include downtown Clayton, Forest Park, and downtown St. Louis. It is the only U.S. light rail system to cross state lines.
The Downtown Seattle Transit Tunnel (DSTT), also referred to as the Metro Bus Tunnel, is a 1.3-mile-long (2.1 km) pair of public transit tunnels in Seattle, Washington, United States. The double-track tunnel and its four stations serve Link light rail trains on the 1 Line as it travels through Downtown Seattle. It runs west under Pine Street from 9th Avenue to 3rd Avenue, and south under 3rd Avenue to South Jackson Street. 1 Line trains continue north from the tunnel to Northgate station and south through the Rainier Valley past Seattle–Tacoma International Airport to Angle Lake station as part of Sound Transit's light rail network.
The A Line is a 48.5-mile (78.1 km) light rail line in Los Angeles County, California. The A Line runs east-west between Azusa and Pasadena, then north-south between Pasadena and Long Beach, via Downtown Los Angeles. The A Line is currently the longest light rail line in the world, surpassing the Coast Tram in Belgium.
Metro Transit is an enterprise of the Bi-State Development Agency and operates public transportation services in the St. Louis region. In 2023, the system had an annual ridership of 19,528,200, or about 59,800 per weekday as of the fourth quarter of 2023.
St. Louis Union Station is a National Historic Landmark and former train station in St. Louis, Missouri, United States. At its 1894 opening, the station was the largest in the world that had tracks and passenger service areas all on one level. Traffic peaked at 100,000 people a day in the 1940s. The last Amtrak passenger train left the station in 1978.
Union Station is a light rail station on the Red and Blue lines of the St. Louis MetroLink system. This below-grade station is located partially within the former baggage tunnel beneath historic St. Louis Union Station near 18th Street at its intersection with Clark Avenue.
Stadium station is a light rail station on the Blue and Red lines of the St. Louis MetroLink system. This below-grade station is located alongside 8th Street between Spruce Street and Clark Avenue. It is located near Busch Stadium, after which the station is named.
Convention Center station is a light rail station on the Red and Blue lines of the St. Louis MetroLink system. This subway station is located beneath the intersection of 6th Street and Washington Avenue in St. Louis' Central Business District.
Laclede's Landing station is a light rail station on the Red and Blue lines of the St. Louis MetroLink system. This elevated station is located in downtown St. Louis near Laclede's Landing.
Transportation in Greater St. Louis, Missouri includes road, rail, ship, and air transportation modes connecting the bi-state St. Louis metropolitan area with surrounding communities throughout the Midwest, national transportation networks, and international locations. The Greater St. Louis region also supports a multi-modal transportation network that includes bus, paratransit, and light rail service in addition to shared-use paths, bike lanes and greenways.
Skinker station is a light rail station on the Blue Line of the St. Louis MetroLink system. This subway station is located beneath the intersection of Skinker Boulevard and Forest Park Parkway near the boundary of St. Louis and University City, Missouri.
University City–Big Bend station is a light rail station on the Blue Line of the St. Louis MetroLink system. This subway station is located beneath the intersection of Big Bend Boulevard and Forest Park Parkway and primarly serves passengers arriving on foot from nearby universities and surrounding neighborhoods.
Maplewood–Manchester station is a light rail station on the Blue Line of the St. Louis MetroLink system. This station is located on an embankment near Manchester Road between South Hanley Road and Laclede Station Road in Maplewood, Missouri.
The Laclede Gas Building is a 31-story, 122 m (400 ft) skyscraper located at 720 Olive Street in Downtown St. Louis, Missouri. It was designed by the Emery Roth & Sons architecture firm, and was built between 1967 and 1969 for the Laclede Gas Company, which had outgrown its 10-story building at 1017 Olive Street. The Laclede Gas Company vacated the building in March 2015, after 45 years in the space. The building has since been converted to mixed-use, and presently consists of both office and residential spaces.
The Red Line is the older and longer line of the MetroLink light rail system in Greater St. Louis. It serves 29 stations across three counties and two states.
The Blue Line is the newer and shorter line of the MetroLink light rail service in Greater St. Louis. It serves 25 stations across three counties and two states.
Westlake station is a light rail station that is part of the Downtown Seattle Transit Tunnel in Seattle, Washington, United States. The station is located under Pine Street between 3rd and 6th avenues in Downtown Seattle, near Westlake Center and Westlake Park. It is served by the 1 Line, part of Sound Transit's Link light rail system, and also connected above ground by buses at several stops, the South Lake Union Streetcar, and the Seattle Center Monorail.
The Bi-State Development Agency was established as an interstate compact between Missouri and Illinois in 1949. This compact created an organization that has broad powers in seven county-level jurisdictions. Bi-State operates five enterprises including the Gateway Arch Riverfront, Metro Transit, the St. Louis Downtown Airport, the St. Louis Regional Freightway and the Bi-State Development Research Institute.
The St. Louis Freight Tunnel is a historic railroad tunnel beneath Washington Avenue and Eighth Street in downtown St. Louis. Completed in 1874, it carried freight and passenger trains between the Eads Bridge and the rail yards in the Mill Creek Valley, bypassing busy downtown streets. It fell into disuse after 1974 and sat dormant for nearly two decades before being refurbished by 1993 for use by MetroLink, the light rail system in Greater St. Louis.
