Markoβs Memories are the first Spider-Man 2 collectibles youβll unlock in the latest video game developed by Insomniac Games while playing the One Thing at a Time mission in the Financial District. One Thing at a Time is the second Spider-Man 2 mission, and it requires you to clear the city of Markoβs mobs before Peter and Miles can return to school.
During the said mission, youβll automatically get Markoβs first Memory or Sandmanβs first Memory if you want. This type of collectible is required to help Marko, whose mind was shattered.
While the first Marko Memory in Spider-Man 2 is unlocked automatically as part of the said mission, the rest of them must be found through exploration. The first four of Markoβs Memories are located in the Financial District.
Where To Find the Four Financial District Markoβs Memories in Spider-Man 2
Since the map in Spider-Man 2 must be unfogged by visiting all areas, itβs worth knowing where to look for Markoβs Memories so you can save time. As such, you can see the locations of all Sandmanβs Memories in the Financial District on the following map.

Now, letβs see where to find them in the game, following the same order as the one on the map above.
Markoβs Memory #1 (Sheβs Gone): Unlocked Automatically During the Story
As mentioned above, the first Financial District Memory is unlocked automatically during the story. This collectible unlocks the rest, meaning you canβt miss it. You will get it while playing as Miles Morale, who must investigate an office on fire.
After you put out the flames using the water pipe (press L1+R1), your objective is to investigate the crystal. However, youβll need to deal with Markoβs mobs first. Once you clear the area, look around the room to spot Markoβs Memory Crystal pictured below.

Interact with the crystal, then press L2+R2 to hear Flint Marko talking about his wife.
Markoβs Memory #2 (Prying Eyes): In the Southern Financial District Park
For the second Memory collectible, head to the southern side of the Financial District, where youβll find a small park. Markoβs Memory awaits behind a round fountain close to the waterβs edge. Stay alert when approaching this collectible because youβll get ambushed.
Defeat the mobs and break the crystal to hear Flint Marko telling Keemia that someone is watching them. Keemia Alvarado is the daughter of Alma Alvarado and Sandman.

Markoβs Memory #3 (Being Followed): On Top of a Building
Around 500 meters northeast of the previous collectible, you can find the third Financial District Memory in Spider-Man 2. As you can see below, this one is on top of a building. After you reach the roof, deal with the mobs and approach the crystal.
When you break this crystal, youβll hear the Sandman insisting that someone is tracking him. Youβll also hear him questioning his mental sanity.

Markoβs Memory #4 (No One Believes Me): On an Alley
For the last of the four Financial District Markoβs Memories, head to the northern side of the region, and youβll find it on a small alley. Here, youβll get ambushed by more Sandman mobs, but if you use the pipes around the collectible, you should be able to dispatch them pretty fast.
When you break the crystal, youβll hear Marko struggling to find someone to listen to his problems. But he is ignored by everyone.

After picking the fourth memory crystal in the Financial District, youβll get a phone call from MJ, who informs you that Marko is getting better, so she insists that you continue looking for the remaining memories.