Leonard P. Zakim Bunker Hill Memorial Bridge is a cable-stayed bridge that carries eight lanes of the Interstate 93 and U.S. Route 1 concurrency, plus a two lane access ramp, across the Charles River in Boston, Massachusetts.
The bridge was built as part of the Big Dig, the largest overall highway construction project in the United States.
The entrance to the Thomas P. "Tip" O'Neill Jr. Tunnel, another major component of the Big Dig, is at the bridge's southern end, while north of the bridge I-93 heads toward New Hampshire and US 1 splits from the Interstate and travels northeast toward Massachusetts' north shore, crossing the Mystic River via the Tobin Bridge.
The bridge replaced the Charlestown High Bridge when it opened, and is the world's widest cable-stayed bridge. The bridge is now a major landmark and major piece of the Boston skyline. It has been featured in several films recently including the 2005 version of War of the Worlds and Martin Scorsese's The Departed. It can also be briefly seen in the opening credits of the television show, Boston Legal and often serves as a backdrop for interviews.
I was being lazy so I let Wikipedia do the talking.