The beauty of the pedestrian bridge stretching between Denver International Airport’s main terminal and the A concourse is in the eye of the crosser: It is the gateway to the Rockies for people from far-off lands or a potential shortcut for flyers running late.

No matter the perspective, the 365-foot-long pathway is a unique part of DIA. The free-spanning pedestrian overpass, supported by 35-foot steel trusses, is (for now) the longest structure of its kind in North America. It is designed so that two passengers jets can pass beneath it wingtip to wingtip.

On Friday afternoon, officials from DIA, the city of Denver and the design and construction teams that created it gathered at the airport’s Westin Hotel to mark the 25th anniversary of the bridge’s completion. It was built in fewer than 12 months and was finished roughly a year and a half before the airport opened to passengers in February 1995, officials say.

“Just from a structural standpoint, the steel has got to be substantial in height or length just to able to span that distance without a column,” Tim Habben, president of the bridge’s designer, LOA Architecture, told The Denver Post prior to Friday’s event. “Whenever I am trying to establish some credibility with clients that we don’t know, I point to that bridge.”

Luis Acosta, who founded Denver-based LOA as Luis O. Acosta Architects in 1985, led the design.

Fun fact: DIA has the only passenger bridge in the US where you can watch an airplane taxi beneath you

— Denver Int’l Airport (@DENAirport) September 30, 2013

Not only is it free spanning, the bridge was built as a self-supporting structure independent of the terminal and concourse buildings because it was not part of the airport’s original design, according to Habben. It was added later, he

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