In the ES theatre, there is a thrust stage, which extends out into the audience, breaking the fourth-wall. Creating an act that can be viewed from the front, left, and right of the stage.
In the ES and HS theatre there are control booths which controls the sound and light during performances, most control booths are not in opened area, most have their little room in the back of the audience.
The catwalk both in the ES and HS theatre is a narrow walkway/platform above the audience made for the teach crew to adjust the lights and other technical adjustments/work. 
both the ES and HS theatre has a full fly space, meaning the flies can be hidden fully when not being used, giving the audience a better experience when watching.
In the ES theatre, there is a proscenium arch, that is lower-able, as it can be adjusted to fit the type of performance on stage, as well as creating a fourth wall between the actors on stage and the audience.