Barry travels back in time to recruit Snart to help with his heist of A.R.G.U.S. in the present in episode 3x22 "Infantino Street".
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 4x19 "Canary Cry". Oliver stands over Laurel's grave with Felicity in episode 4x23 "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 4x23 "Schism".
Church forces Rene to dig his own grave in the woods in episode 5x05 "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".