I've only seen Minnesota, Wisconsin and Northwestern. Sometime I'm going to have to make the trip down to Champaign and see Illinois's massive row for myself.
Northwestern is nice- it's kinda like a greek village built in 1900- all the houses are on university land, and all together, but old and pretty.
At Minnesota, most fraternities are together along University Avenue- and those are old, original houses that are beautiful and architecturally diverse. Then the sororities and a few other fraternities are clustered on a few blocks farther away from campus. Some of the houses are nicer than others, and they're not necessarily all together on one street.
Wisconsin is really nice. All (but 2) organizations are along Langdon Street, so fraternities and sororities are interspersed. The houses are fairly large (each hold at least 40+ people, I'd say) and most are old and of different styles as well. Also, a few of them have lake access or are directly on the lake, and I'm sooooo jealous of that.
One kind of sad thing about Wisconsin and Minnesota is, though, that when you've lived in the area for a while, you find out that other beautiful buildings in the greek neighborhoods were greek houses at one time, and many have been converted to apartments and/or not well-maintained. I'm sure this is common at many schools.

Of the places I've been...

Indiana (for UIFI in 2004) - houses are every where, most very big and impressive. I didn't like the distance away from campus, but it's interesting how many chapters have gone through and built new houses to join the others on the outskirts. At the time the Beta chapter at IU was reorganizing, and there was talk about moving out of the old house which had a phenomenal location to build a new house, which a check of their website looks like they did.

Oklahoma - AMAZING houses. The Beta house there was awesome, great rooms (huge compared to those my chapter has). This is probably my #1 favorite "row"

Iowa State - okay greek row, nothing spectacular.

Kansas State - kind of spread out, some really impressive houses and some not so impressive ones.

Kansas - probably on par with those at Oklahoma. Lawrence's hills make for some very impressive locations and such - the Theta house is one that sticks out to me. Beta's house there is also pretty awesome, and the Kappa Sig (maybe it's PhiPsi - I don't remember exactly) house is just ginormous.

Nebraska - I think my alma mater does pretty well in comparison, we do have a pretty significant "row" (it's actually two streets making more of a 'T' on the Southwestern corner of campus). Certainly our locations on campus are great, but there's very little land, so the lots are small, everyone is right on top of each other and there's no room to expand. But again, UNL's city campus is pretty compact, so the locations are great and it's an easy walk to class, because you're RIGHT there.

Agreed. I LOVE OU & KU's houses.
The beta house at OU is phenominal. I think what I find most impressive for OU is the amount of land the chapters have. It's one of few campuses where they are able to build out as much as they want. The DTD, KE, Phi Delt, FIJI (wow!), EN, DDD houses in particular go out way more then they go up.

pics of the houses: http://studentlife.ou.edu/content/view/153/

I like the fraternity houses at Penn. The houses are old school brick and stone. THey don't really have a Greek row but most of the houses are on Locust Walk. It used to be Locust St but the city closed that section of the street about 40 years ago. Most of the houses are about 100 years old. Most of the houses are 3 stories with a commercial kitchen in the basement and a dumbwaiter to the first floor dining room. The second and third floors are bedrooms.

Pic of the Castle.
http://www.facilities.upenn.edu/maps...dg.php3?id=124
http://www.castlealumni.com/Default....ookieSupport=1

Theta house at OU is very nice.

SAE is kind of ugly, imo. Inside is extremely nice but the outside reeks of 1976.

That SAE house looks like my elementary school! I've been trying to find a picture of the SAE house at PSU - it's the standard by which I always measured beautiful fraternity houses. The one at SMU looks pretty grand, though!

ETA: Found a side view:

http://www.collegian.psu.edu/archive...-dnews-7b1.jpg

^^^Here's another one, it's smaller, but it's in the daylight and the tree hasn't bloomed yet...
http://farm1.static.flickr.com/43/89...96c66d2f_o.jpg

Indiana

I can understand why. They don't want their brand new houses, that they paid millions for, to be tore up like McBride was. And they probably don't want to do repairs on them after every school year either.

And yet Sigma Nu here (among others) who have likely far more expensive houses still party.

Southern Cal
 

Okay - I KNOW I am biased .....:)but I just Love my alma mater's Row....especially this place!

http://i260.photobucket.com/albums/i...28thStreet.jpg



:)

Just down Milledge....
 

This beauty
http://i260.photobucket.com/albums/i...ammaPhiUGA.jpg
is just down the way from the beautiful AGD house (this photo below does not do it justice - it really is stunning!)
http://i260.photobucket.com/albums/i...col/UGAAGD.jpg

its not a matter of understanding why, it makes perfect sense from a liability issue for the university. What i'm saying is, that i feel like it takes away from the experience to a degree

The Alpha Gamma Delta house in this picture reminds me of the Alpha Gam chapter house at Illinois Wesleyan University (see link). While at Illinois State just down the street from WIU I attended some dances held at the Alpha Gam house. Good times.

http://www.agdxi.com/