Many of the scenes in the NBC series "E.R." show parts of Chicago, a bridge crossing the river, an El station, the outside of a hospital, etc.

Does anyone know where any of these locations, if real, are?

If you'd like to know where "Law And Order" is shot, drop by the New York City forum and I'll return the favor.

I've never seen a complete episode, but I understand that the crew comes to town a few times a year for exterior location shots. If there's something in particular (i.e., there are dozens of bridges across the Chicago River, and scores of "L" stations) it shouldn't be too hard to track down.

IMDB and/or TV.com are also often good for this kind of stuff, although sometimes even they need corrections!

That would be an interesting list to compile.

It's been a while since I watched, but I recall a number of things.

Many scenes are definitely filmed on location here. One of the early ones was at night time on the north end of the Michigan Avenue bridge looking toward the southwest, with Anthony Edwards and George Clooney, and a bunch of lighted buildings in the background. There is a niche in the railing where they stood.

Memorable as well were scenes of Clooney at Christmastime next to the decorated Water Tower (http://en.wikipedia.org/wiki/Chicago_Water_Tower).

I remember Goran Visnjic in a scene on Dearborn Street with the unmistakable tower of the Polk Street Station rising in the background. I'd place him around 700-800 South Dearborn. In a week, the Printers Row Book Fair will be running on that spot.

I found this in a web search:

"The hospital who`s exterior is seen on the show is the University of
Illinois Hospital at 1720 W. Taylor Street, which is part of the
University of Illinois Medical School. (This is not to be confused
with the University of Illinois at Chicago (UIC) Hospital, which
is eight blocks to the east). The U of I hospital is about a
half-mile from the real Cook County Hospital."

Lots of L stations are featured, including dramatic runs up and down the steps, and you can often identify the exact spot.

Many other examples.

I also remember an early episode with George Clooney's character referring to "the corner of Dearborn and Clark." Interesting, since these streets run parallel.

I vaguely recall mention of an address that is non-existent, since it would be located out in Lake Michigan.

I remember one scene that cracked me up. Was back when Sherry Stringfield first left the show (to go help her sister or something in the storyline) and Anthony Edwards was running around trying to catch her before she left. They basically used it as an excuse to show just about every landmark in the city, but his route and the distance run was preposterous. Running the whole way, started at the hospital, ran to her apartment in Wrigleyville (naturally passing Wrigley itself), then back to the loop, a circuitous route to hit some landmarks (daley plaza, water tower, wrigley building, etc), then over to union station to catch her leaving on a train.

With the exception of obvious on locations shots, it's almost all a set WB studios, patched asphalt and all. It's part of the WB studios tour. The detail they go through on the building exteriors and the L are amazing.
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The "location" of the hospital is actually supposed to be somewhere around the Michigan Avenue Bridge, as when people go outside of the ER to lean and look wistfully out on the river, that's usually what they show.

So then is what we see on the show a re-creation of an actual building?

I can assure you that when you watch "Law and Order" you are indeed looking at the actual front of the New York County courthouse, a building I enter regularly.

They also used to film (1999-2003 era for sure) at the Northwestern University campus in Chicago (not Evanston). Specifically, a courtyard west of Wieboldt Hall south of Superior Street.