From 1953 to 1989, the Rocky Flats Plant, a DOE nuclear weapon facility that was about 15 miles from Denver, produced fissile plutonium "pits" for nuclear warheads. A major fire at the facility in 1957, as well as leakage from nuclear waste stored at the site between 1958 and 1968, resulted in the contamination of some parts of Denver, to varying degrees, with plutonium-239, a harmful radioactive substance with a half-life of 24,200 years.[37] A study by the Jefferson County health director, Dr. Carl Johnson, in 1981, linked the contamination to an increase in birth defects and cancer incidence in central Denver and nearer Rocky Flats. Later studies confirmed many of his findings.[38][39][40] Plutonium contamination was still present outside the former plant site as of August 2010,[41] and presents risks to building the envisioned Jefferson Parkway,[42] which would complete Denver's automotive beltway.
Denver has many nationally recognized museums, including a new wing for the Denver Art Museum by world-renowned architect Daniel Libeskind, the second largest Performing Arts Center in the nation after Lincoln Center in New York City and bustling neighborhoods such as LoDo, filled with art galleries, restaurants, bars and clubs. That is part of the reason why Denver was, in 2006, recognized for the third year in a row as the best city for singles.[93] Denver's neighborhoods also continue their influx of diverse people and businesses while the city's cultural institutions grow and prosper. The city acquired the estate of abstract expressionist painter Clyfford Still in 2004 and built a museum to exhibit his works near the Denver Art Museum.[94] The Denver Museum of Nature and Science holds an aquamarine specimen valued at over $1 million, as well as specimens of the state mineral, rhodochrosite. Every September the Denver Mart, at 451 E. 58th Avenue, hosts a gem and mineral show.[95] The state history museum, History Colorado Center, opened in April 2012. It features hands-on and interactive exhibits, artifacts and programs about Colorado history.[96] It was named in 2013 by True West Magazine as one of the top-ten "must see" history museums in the country.[97] History Colorado's Byers-Evans House Museum and the Molly Brown House are nearby.

Jump up ^ Moore, LeRoy (2007). "Democracy and Public Health at Rocky Flats: The Examples of Edward Martell and Carl J. Johnson". In Quigley, Dianne; Lowman, Amy; Wing, Steve. Ethics of Research on Health Impacts of Nuclear Weapons Activities in the United States (PDF). Collaborative Initiative for Research Ethics and Environmental Health (CIREEH) at Syracuse University. pp. 55–97. Archived from the original (PDF) on March 31, 2012. Retrieved September 17, 2011.


Over the years, the city has been home to other large corporations in the central United States, making Denver a key trade point for the country. Several well-known companies originated in or have relocated to Denver. William Ainsworth opened the Denver Instrument Company in 1895 to make analytical balances for gold assayers. Its factory is now in Arvada. AIMCO (NYSE: AIV)—the largest owner and operator of apartment communities in the United States, with approximately 870 communities comprising nearly 136,000 units in 44 states—is headquartered in Denver, employing approximately 3,500 people. Also Samsonite Corp., the world's largest luggage manufacturer, began in Denver in 1910 as Shwayder Trunk Manufacturing Company, but Samsonite closed its NE Denver factory in 2001, and moved its headquarters to Massachusetts after a change of ownership in 2006. The Mountain States Telephone & Telegraph Company, founded in Denver in 1911, is now a part of telecommunications giant CenturyLink.
There is also an older downtown grid system that was designed to be parallel to the confluence of the South Platte River and Cherry Creek. Most of the streets downtown and in LoDo run northeast–southwest and northwest–southeast. This system has an unplanned benefit for snow removal; if the streets were in a normal N–S/E–W grid, only the N–S streets would receive sunlight. With the grid oriented to the diagonal directions, the NW–SE streets receive sunlight to melt snow in the morning and the NE–SW streets receive it in the afternoon. This idea was from Henry Brown the founder of the Brown Palace Hotel. There is now a plaque across the street from the Brown Palace Hotel that honors this idea. The NW–SE streets are numbered, while the NE–SW streets are named. The named streets start at the intersection of Colfax Avenue and Broadway with the block-long Cheyenne Place. The numbered streets start underneath the Colfax and I-25 viaducts. There are 27 named and 44 numbered streets on this grid. There are also a few vestiges of the old grid system in the normal grid, such as Park Avenue, Morrison Road, and Speer Boulevard. Larimer Street, named after William Larimer, Jr., the founder of Denver, which is in the heart of LoDo, is the oldest street in Denver.
As of 2017, Denver International Airport has been rated by Skytrax as the 28th best airport in the world, falling to second place in the United States behind only Cincinnati/Northern Kentucky International Airport. Skytrax also named DIA as the second best regional airport in North America for 2017, and the fourth best regional airport in the world.
Although Denver's nickname is the "Mile-High City" because its official elevation is one mile above sea level, defined by the elevation of the spot of a benchmark on the steps of the State Capitol building, the elevation of the entire city ranges from 5,130 to 5,690 feet (1,560 to 1,730 m). According to Geographic Names Information System (GNIS) and the National Elevation Dataset, the city's elevation is 5,278 feet (1,609 m), which is reflected on various websites such as the National Weather Service.[51]
También nuestra empresa es líder en la producción de boletos de seguridad e igualmente tenemos una larga experiencia comprobada en el manejo y administración de taquillas de eventos masivos. Inter conectamos múltiples organismos entre sí, siendo los primeros en el país en manejar puntos de ventas externos al sitio de evento de forma totalmente segura y centralizada gracias a nuestros conocimientos amplios en redes de telecomunicación y base de datos
Denver has hosted the Democratic National Convention twice, in 1908 and again in 2008, taking the opportunity to promote the city's status on the national, political, and socioeconomic stage.[49] On August 10–15, 1993, Denver hosted the Catholic Church's 6th World Youth Day, which was attended by an estimated 500,000, making it the largest gathering in Colorado history.
Denver has many nationally recognized museums, including a new wing for the Denver Art Museum by world-renowned architect Daniel Libeskind, the second largest Performing Arts Center in the nation after Lincoln Center in New York City and bustling neighborhoods such as LoDo, filled with art galleries, restaurants, bars and clubs. That is part of the reason why Denver was, in 2006, recognized for the third year in a row as the best city for singles.[93] Denver's neighborhoods also continue their influx of diverse people and businesses while the city's cultural institutions grow and prosper. The city acquired the estate of abstract expressionist painter Clyfford Still in 2004 and built a museum to exhibit his works near the Denver Art Museum.[94] The Denver Museum of Nature and Science holds an aquamarine specimen valued at over $1 million, as well as specimens of the state mineral, rhodochrosite. Every September the Denver Mart, at 451 E. 58th Avenue, hosts a gem and mineral show.[95] The state history museum, History Colorado Center, opened in April 2012. It features hands-on and interactive exhibits, artifacts and programs about Colorado history.[96] It was named in 2013 by True West Magazine as one of the top-ten "must see" history museums in the country.[97] History Colorado's Byers-Evans House Museum and the Molly Brown House are nearby.

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