In a flashback, Laurel gives the eulogy at Tommy's funeral and later Oliver gives the eulogy at Laurel's funeral and reveals her identity as the Black Canary in episode #419 "Canary Cry". Oliver stands over Laurel's grave with Felicity in episode #423 "Schism".
Source: YVRShoots — Twitter
Oliver finishes burying Taiana while the last of the prisoners are airlifted out by Amanda Waller and A.R.G.U.S. in episode #423 "Schism".
Church forces Rene to dig his own grave in the woods in episode #505 "Human Target".
Park where Broyles and Senator Van Horn talk in episode #206 "Earthling". Also where Broyles and Olivia talk at the end of #208 "August".
The team gets surrounded by suspicious rebels while heading to their camp in episode #113 "Leviathan".
The rebels come upon the ruins of the other rebel camp in episode #113 "Leviathan".
Episode #1006 "200".