Mobley ( James Rees ), Romero (Ron C. Jones), Mr Robot (Christian Slater) and Elliot (Rami Malek) have arrived at the entry to Steel Mountain.
At 04:36 Elliot narrates "We're trying to penetrate a data security facility whose tagline literally is ..." and the camera pulls back to complete his sentence by showing the word "Impenetrable" on a sign at the security gate. Several satellite dishes can be seen along the curbside as the team drives in.
The security gate and "Steel Mountain Corporation Impenetrable" sign are fake but the satellite dishes are real. You can see them at "800 Westchester Avenue" (yes, the real street address is the real name of the facility) which is at 800 Westchester Avenue, Rye Brook NY 10573.
"800 Westchester Avenue" can be entered from Westchester Avenue at one end and Bowman Avenue at the other. The satellite dishes (where Elliot and the team passed through the fake security gate) are just inside the Bowman Avenue entrance.
