Leonard Snart sees the black hole suck up buildings in episode 1x23 "Fast Enough".
Barry and the team stake out of the gallery where the Turtle plans on stealing a painting in episode 2x10 "Potential Energy".
The team watches footage of the Turtle stealing a statue in episode 2x10 "Potential Energy".
Julian and Cisco attempt to help the amnesiac Barry testify in Heat Monger's evidentiary hearing which Cecile is prosecuting in episode 3x21 "Cause and Effect".
The Dodger forces a guard to steal a priceless gem for him in episode 1x15 "Dodger".
Oliver gives testimony about what occurred on the island and then has a run-in with Laurel at the courthouse in episode 1x02 "Honor Thy Father". Tommy intercepts Laurel as she is leaving work in episode 1x03 "Lone Gunmen". Oliver has a hearing here when he is accused of being the Vigilante in episode 1x05 "Damaged". Appears in 4 more episodes.
Oliver is perp-walked up the steps into the police department while being swarmed by press in episode 1x05 "Damaged".
Diggle and Carly talk about their relationship while strolling through a park in episode 1x15 "Dodger".
The Dodger attempts to sell his stolen gem to Cass Derenick but the fence tries to rip him off in episode 1x15 "Dodger".
From episode 1x05 "Damaged".
The outside of the metro station where the team stop Diane Burgess from exploding in episode #203 "Fracture".
Peter meets in a congressional meeting room, and then Fauxlivia, Walter, and Peter talk on the steps of the capitol building in episode 3x01 "Olivia".
Walternate receives a phone call about Olivia's escape in episode 3x08 "Entrada".
Olivia goes undercover to stop the attack on the art show in episode 3x12 "Concentrate and Ask Again".
Backstrom meets with the civilian oversight committee and has a panic attack during his testimony in episode 1x04 "I Am a Bird Now".
Backstrom confronts Cassandra Lastrange after she talks to Charles Turner in episode 1x01 "Dragon Slayer". Gravely and ADA Kines convince a judge to give them a warrant on the steps to the courthouse in episode 1x10 "Love Is a Rose and You Better Not Pick It". Backstrom and Amy have a fight on the steps in episode 1x12 "Corkscrewed".