Denver used to be a major trading center for beef and livestock when ranchers would drive (or later transport) cattle to the Denver Union Stockyards for sale. As a celebration of that history, for more than a century Denver has hosted the annual National Western Stock Show, attracting as many as 10,000 animals and 700,000 attendees. The show is held every January at the National Western Complex northeast of downtown.
Mass transportation throughout the Denver metropolitan area is managed and coordinated by the Regional Transportation District (RTD). RTD operates more than 1,000 buses serving over 10,000 bus stops in 38 municipal jurisdictions in eight counties around the Denver and Boulder metropolitan areas. Additionally, RTD operates nine rail lines, the A, B, C, D, E, F, L, R, W, and H with a total of 57.9 miles (93.2 km) of track, serving 44 stations. All lines are Light Rail except the A Line and B Line, which are Commuter Rail, with the G Line to the suburb of Arvada, opening soon pending federal approval in 2017, and the N Line to Commerce City and Thorton, soon to open in 2018. FasTracks is a Commuter Rail, Light Rail and Bus expansion project approved by voters in 2004, which will serve neighboring suburbs and communities. The W line, or West line, opened in April 2013 serving Golden/Federal Center. An Express Bus Service, known as the Flatiron Flyer, serves to connect Boulder and Denver. The service, billed as Bus Rapid Transit, has been accused of Bus rapid transit creep for failing to meet the majority of BRT requirements, including level boarding and all-door entry. A Commuter Rail connection to Boulder and its suburb of Longmont, also part of the FasTracks ballot initiative and an extension of the B Line, is to be finished sometime after 2040. In addition, the N Line, under FasTracks, is another Commuter Rail line currently under construction with an expected completion date in 2018 and will serve the suburbs of Commerce City and Thorton.
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. 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. 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. The state history museum, History Colorado Center, opened in April 2012. It features hands-on and interactive exhibits, artifacts and programs about Colorado history. It was named in 2013 by True West Magazine as one of the top-ten "must see" history museums in the country. History Colorado's Byers-Evans House Museum and the Molly Brown House are nearby.