"Trajan's Bridge" at Drobeta-Turnu Severin
Trajan's Bridge (Apollodorus Bridge) spanned the Danube at Drobeta-Turnu Severin, built 103–105 AD by Apollodorus of Damascus; first kilometer-long bridge, 54 m spans, destroyed under Aurelian.
1 Police Plaza
1 Police Plaza, often written One Police Plaza, is the brutalist headquarters of the New York City Police Department in Lower Manhattan, dedicated in 1973.
1 World Trade Center (1970–2001)
1 World Trade Center, known as the North Tower, was a 110-story Manhattan skyscraper completed in 1972 and destroyed in the September 11, 2001 attacks.
10 Hudson Yards
10 Hudson Yards is a 52-story commercial office tower in Manhattan, the first completed in the Hudson Yards development; it opened in May 2016 with Coach and L'Oréal as anchor tenants.
100-year flood
A 100-year flood, also known as the base flood, is a flood with a 1-percent annual chance of occurring; despite the name, such floods can strike consecutive years.
100% Design
100% Design was a London design trade fair for contemporary furniture, lighting, and interiors, held annually from 1995 and rebranded as Design London in 2020.
111 West 57th Street
111 West 57th Street, or Steinway Tower, is a 1,428-foot, 84-story supertall condo tower on Billionaires' Row, Manhattan, joined to the 1925 landmarked Steinway Hall; at a 1:24 width-to-height ratio it is the world's thinnest skyscraper, designed by SHoP Architects.
1211 Avenue of the Americas
1211 Avenue of the Americas, also known as the News Corp. Building, is a 45-story office skyscraper on Sixth Avenue in Midtown Manhattan, completed in 1973.
122 Leadenhall Street
122 Leadenhall Street, officially the Leadenhall Building and known as the Cheesegrater, is a 225-meter wedge-shaped office skyscraper in the City of London, completed in 2014.
12305 Fifth Helena Drive
12305 Fifth Helena Drive is a 1929 Spanish Colonial house in Brentwood, Los Angeles, the only home Marilyn Monroe ever owned, where she died in 1962 at age 36.
1251 Avenue of the Americas
1251 Avenue of the Americas, formerly the Exxon Building, is a 54-story office skyscraper in Midtown Manhattan, completed in 1971 and owned by Mitsui Fudosan America.
16 Divisions
The 16 Divisions, often called MasterFormat 95, were the original top-level structure of MasterFormat, the Construction Specifications Institute's classification of construction specifications, used from 1964 until the 2004 expansion to 50 divisions.
175 Park Avenue
175 Park Avenue, also known as Project Commodore, is a proposed supertall office and hotel tower beside Grand Central Terminal in Midtown Manhattan, designed by Skidmore, Owings & Merrill.
1854 Broad Street cholera outbreak
The 1854 Broad Street cholera outbreak, also known as the Golden Square outbreak, killed about 616 people in Soho, London, in 1854, after physician John Snow traced it to the Broad Street water pump.
1915 Çanakkale Bridge
The 1915 Çanakkale Bridge (Çanakkale Boğaz Köprüsü) is a suspension bridge over the Dardanelles in Türkiye, opened in 2022 with the world's longest suspension span at 2,023 m.
1915 Vanceboro international bridge bombing
The 1915 Vanceboro international bridge bombing was a German sabotage attempt by Werner Horn, who dynamited the railway bridge between Maine and New Brunswick on February 2, 1915.
1929 Ottawa sewer explosion
The 1929 Ottawa sewer explosion was a series of blasts in Ottawa's sewers on 29 May 1929 that killed one person; the cause was never determined.
1975 Banqiao Dam failure
The 1975 Banqiao Dam failure was the collapse of the Banqiao Dam on the Ru River in Henan, China, after record Typhoon Nina rainfall, killing up to 230,000 people.
1979 Machchhu dam failure
The 1979 Machchhu dam failure, also known as the Morvi dam burst, collapsed the Machhu-II dam in Gujarat, India, on 11 August 1979, killing about 2,000 people in Morbi.
1982 Salang Tunnel fire
The 1982 Salang Tunnel fire killed an estimated 176 to several thousand people in Afghanistan in November 1982, when a fuel tanker exploded in the tunnel.
1992 Guadalajara explosions
The 1992 Guadalajara explosions were a series of gasoline-vapor sewer blasts in Guadalajara, Mexico, on April 22, 1992, destroying streets in the Reforma district and killing more than 200 people.
1992 Windsor Castle fire
The 1992 Windsor Castle fire broke out on 20 November 1992 in Windsor Castle's Private Chapel in Berkshire, England, destroying or damaging 115 rooms, including nine State Rooms.
1993 Milwaukee cryptosporidiosis outbreak
The 1993 Milwaukee cryptosporidiosis outbreak was a waterborne disease outbreak in Milwaukee, Wisconsin, that sickened an estimated 403,000 people, the largest in United States history.
1995 Daegu gas explosions
The 1995 Daegu gas explosions killed 101 people when leaked city gas ignited at a subway construction site in Daegu, South Korea, on 28 April 1995.
2 World Trade Center
2 World Trade Center, also called Two World Trade Center, is a planned 55-story, 1,226-foot Manhattan skyscraper that will house American Express's headquarters, expected to open in 2031.
2–8a Rutland Gate
2–8a Rutland Gate, Knightsbridge mansion overlooking Hyde Park; sold for £210m in 2020, Britain's most expensive house; built 1985–87 by YRM; linked to Rafik Hariri, Sultan bin Abdul Aziz, Cheung Chung-kiu, and Hui Ka Yan; now empty.
20 Fenchurch Street
20 Fenchurch Street, known as the Walkie-Talkie, is a 160-meter skyscraper in the City of London designed by Rafael Viñoly and completed in 2014, topped by the public Sky Garden.
200 West Street
200 West Street is a 43- to 45-story, roughly 740-foot office tower in Battery Park City, Lower Manhattan, that has housed Goldman Sachs' global headquarters since late 2009.
2005 levee failures in Greater New Orleans
The 2005 levee failures in Greater New Orleans were more than 50 breaches during Hurricane Katrina on August 29, 2005, flooding about 80 percent of the city.
2008 Channel Tunnel fire
On September 11, 2008, the 2008 Channel Tunnel fire erupted on a Eurotunnel Truck Shuttle near the French exit. It reached 1,000°C, injuring six people.