All 8 Fountain Locations:
1. Firehouse: In the Beginning of the game, after you slide down the pole but before the stairs you go down.
2. Sedgewick Hotel: When you begin the first Sedgewick Hotel level, after they get done talking go to the right and in that hallway.
3. Sedgewick Hotel: After the flooded hallways and before the Sargassi's Restaurant.
4. Times Square: In the back of laundromat before you leave.
5. Times Square: After being chased by Stay Puff and past the elevator cutsense, down the hallway and on your left.
6. Library: Right before the Children Section.
7. Museum: Past the hidden door in the Egypt exhibit, down the dark hallway next the the giant Egyptian head.
8. Return To the Sedgewick : Right when you kick the door to the Generator Room, right in front of you.

For those who need visual aid I add a video showing them off:

All Ghost Scans and Artifacts:
1. Sedgewick Hotel - Scans & Artifacts

2. Times Square - Scans & Artifacts

3. Public Library - Scans & Artifacts

4. Museum - Scans & Artifacts

5 .Return To The Sedgewick - Scans & Artifacts

6. Lost Island - Scans & Artifacts

7. Central Park Cemetery - Scans & Artifacts