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.
Comerica Bank Tower is a 60-story postmodern skyscraper located at 1717 Main Street in the Main Street District in downtown Dallas, Texas. Standing at a structural height of 787 feet (240 m), it is the third tallest skyscraper in the city of Dallas. It is also the sixth tallest building in Texas and the 61st tallest building in the United States. The building was designed by Philip Johnson and John Burgee, and was completed in 1987. The structure has 1,500,000 square feet (100,000 m2) of office space.
RÉSO, commonly referred to as the Underground City, is the name applied to a series of interconnected office towers, hotels, shopping centres, residential and commercial complexes, convention halls, universities and performing arts venues that form the heart of Montreal's central business district, colloquially referred to as Downtown Montreal. The name refers to the underground connections between the buildings that compose the network, in addition to the network's complete integration with the city's entirely underground rapid transit system, the Montreal Metro. Moreover, the first iteration of the Underground City was developed out of the open pit at the southern entrance to the Mount Royal Tunnel, where Place Ville Marie and Central Station stand today.
Path is a network of underground pedestrian tunnels, elevated walkways, and at-grade walkways connecting the office towers of Downtown Toronto, Ontario, Canada. It connects more than 70 buildings via 30 kilometres (19 mi) of tunnels, walkways, and shopping areas. According to Guinness World Records, Path is the largest underground shopping complex in the world, with 371,600 square metres (4,000,000 sq ft) of retail space which includes over 1,200 retail fronts (2016). As of 2016, over 200,000 residents and workers use the Path system daily with the number of private dwellings within walking distance at 30,115.
The Chicago Pedway is a network of tunnels, ground-level concourses and bridges in Chicago, Illinois connecting skyscrapers, retail stores, hotels, and train stations throughout the central business district.
The Main Street District of downtown Dallas, Texas runs along Main Street and is bounded by Elm Street one block north, Commerce St. one block south, N. Lamar St. to the west, and US 75/I-45 (I-345) elevated highway to the east. The district is the spine of downtown Dallas, and connects many of the adjoining business and entertainment districts. It does not include Dealey Plaza or the John Fitzgerald Kennedy Memorial which are a few blocks west in the West End Historic District.
The Plus 15 or +15 is a skyway network in Calgary, Alberta, Canada. It is the world's most extensive pedestrian skywalk system, with a total length of 16 kilometres and 86 bridges connecting 130 buildings, as of 2022. Calgary often has severe winters and the walkways allow people to get around the city's downtown more quickly and comfortably. The busiest parts of the network saw over 20,000 pedestrians per day in a 2018 count.
The Downtown Halifax Link system is a network of climate-controlled pedways connecting various office buildings, hotels, parkades, and entertainment venues around downtown Halifax, Nova Scotia, Canada. It is similar to Toronto's PATH or Montreal's RÉSO system, but on a much smaller scale. These walkways are all open to the public, and are convenient during inclement weather and the winter months.
The Houston tunnel system is a network of subterranean, climate-controlled, pedestrian walkways that links 95 full city blocks 20 feet (6 m) below Houston's downtown streets. It is approximately six miles (9.7 km) long. There are similar systems in Chicago, Dallas, Oklahoma City, Montreal, and Toronto. Architectural historian Stephen Fox has stated that the idea for the tunnel system came when the Bank of the Southwest Building was "linked by tunnel to the 1010 Garage and the Mellie Esperson Building" in 1961.
Constitution Plaza is a large commercial mixed-use development in Downtown Hartford, Connecticut. It is located on the east side of the downtown area, near the Connecticut's Old State House. The plaza consists of two main plazas, which are connected by an elevated bridge. The northern plaza is reminiscent of an Italian piazza, with a 40-foot-tall granite clock tower and patterned brick paving. The southern plaza is dominated by a central fountain.
The Winnipeg Walkway System, also known as the Winnipeg Skywalk, is a network of pedestrian skyways and tunnels connecting a significant portion of downtown Winnipeg, Manitoba.
Santander Tower, formerly known as Thanksgiving Tower, is a 50-story, 197 m (646 ft) skyscraper at 1601 Elm Street adjacent to Thanks-Giving Square in downtown Dallas Texas. At its completion in 1982, it was the second tallest building in Dallas, surpassing Elm Place. One year later, with the completion of 1700 Pacific, it became the third tallest, and it is currently the 8th-tallest building in the city. The building is connected to the Dallas Pedestrian Network and the Bullington Truck Terminal. Santander Tower is owned and managed by Woods Capital, and it was designed by the architecture firm HKS Architects. Formerly known as the Thanks-Giving Tower, it was renamed in 2020 after Banco Santander.
The National is a 52-story, 191 m (627 ft) skyscraper in the Main Street district of downtown Dallas, Texas, adjacent to the Dallas Area Rapid Transit (DART) Akard Station. It is the tenth tallest building in the city. In January 2010 the building was closed due to low occupancy rates. It was listed on the National Register of Historic Places in 2017.
1600 Pacific Tower, also known as the LTV Tower, is a skyscraper in the City Center District of Dallas, Texas, USA. The building rises 434 feet. The structure contains 33 floors, made up originally of office space, standing as the 29th-tallest building in the city. The building is adjacent to Thanks-Giving Square and was, for a time, connected to the Dallas Pedestrian Network.
One Dallas Center is a modernist skyscraper located in the City Center District of downtown Dallas, Texas, completed in 1979. The building has 30 floors and rises 448 feet. One Dallas Center is currently tied with the Sheraton Dallas Hotel North Tower as the 25th-tallest building in the city. The building was originally planned as part of a three-building complex designed by I.M. Pei & Partners, but only one tower was constructed.
Dorchester Square, originally Dominion Square, is a large urban square in downtown Montreal. Together with Place du Canada, the area is just over 21,000 m2 (230,000 sq ft) or 2.1 ha of manicured and protected urban parkland bordered by René Lévesque Boulevard to the south, Peel Street to the west, Metcalfe Street to the east and Dorchester Square Street to the north. The square is open to the public 24 hours a day and forms a focal point for pedestrian traffic in the city. Until the creation of Place du Canada in 1967, the name "Dominion Square" had been applied to the entire area.
Corrigan Tower, also known as 1900 Pacific or 1900 Pacific Residences, is a high rise located at 1900 Pacific Avenue in the City Center District of Dallas, Texas. The building contains 20 floors, now made up of apartments but originally office space, and is of modernist design. It is situated on the high-traffic corner of St. Paul Street and Pacific Avenue, across from Aston Park and the future Pacific Plaza Park. It lies within the Harwood Historic District, but is not a contributing structure.
Pacific Place is a Class-A office skyscraper located at 1910 Pacific Avenue in the City Center District of Dallas, Texas. The structure contains 20 floors of office space and stands adjacent to the historic Majestic Theatre. It is connected to the Dallas Pedestrian Network and sits across Pacific Avenue from the recently completed Pacific Plaza Park. It lies within the Harwood Historic District, but is not a contributing structure.
Downtown Dallas is the central business district (CBD) of Dallas, Texas, United States, located in the geographic center of the city. It is the second-largest business district in the state of Texas. The area termed "Downtown" has traditionally been defined as bounded by the downtown freeway loop, bounded on the east by I-345 (although known and signed as the northern terminus of I-45 and the southern terminus of US 75, on the west by I-35E, on the south by I-30, and on the north by Woodall Rodgers Freeway.
Plaza of the Americas is a major commercial complex in the City Center District of downtown Dallas, Texas (USA). It is adjacent to DART's Pearl Station and connected to the Dallas Pedestrian Network. The complex features several amenities connected by an enclosed 120,000 sq ft (11,000 m2). skylighted atrium which rises 13 stories above the lowest level:
