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 1x13 "Leviathan".
The rebels come upon the ruins of the other rebel camp in episode 1x13 "Leviathan".
Amaya, Nate, and Ray head out the the Cretaceous wilderness in search of the missing temporal delineator in episode 2x13 "Land of the Lost".
From episode 10x06 "200".