Couple Random Photos. C&C welcome

Hello,

I've got a couple pictures to share. I wouldn't mind hearing what would you guys do differently to make these pictures better.

1. Rebel T2i and Sigma 10-20

This is the new Electrical Engineering building at my alma matter- The State University of New York at Buffalo. This building was completed after I graduated.

There is some wide angle distortion because I got low to the ground and shot pointed up at 10mm. I think I like it. This photo is an HDR.

2. Rebel T2i and Sigma 10-20

Inside Davis Hall. I think I should have moved the garbage cans on the left out of the picture. Felt like this should have been better. Maybe I should moved to left a little bit? This shot is also an HDR.

3. Rebel t2i and Canon 55-250
Pittsburgh skyline at the West End Overlook.

4. Rebel t2i and Canon 55-250

To the left of the skyline. There is nothing particularly special about this picture I suppose. I just like it. Three Rivers Casino in the immediate foreground. Then Heinz Field.

Thanks for looking.
Steven