BioShock Infinite Port Prosperity is another chapter of the videogame, which is unlocked after DeWitt and Elizabeth crash the airship they reclaimed in The Factory and after they go through the area named Emporia.
Because Songbird crashed their airship, DeWitt and Elizabeth realize that Comstock is controlling Songbird using songs, so they have to reach his house.
Even if Port Prosperity is an indoor area, it is a large one and players may overlook some of the BioShock Infinite collectibles available in the mission.
The next guide includes detailed hints and tips regarding their locations.
Telescope #1
After you crash the airship, you have to follow the way inside the Port Prosperity Station. When you exit the station, you can see that there are 2 platforms next to the gondola.
When the fight is over, go at the end of the one on your right (while looking to the giant sign) to find the first BioShock Infinite Telescope in Port Prosperity.

Voxophone #1
Now you should board the gondola. At the end of the ride, follow the path inside the building, pass the ticketing office and the vending machines.
As you climb the stairs in the hallway, keep an eye out on the left side, because you can find the first BioShock Infinite Port Prosperity Voxophone next to some luggage.
COMING FOR COMSTOCK; Preston E. Downs; July the 7th, 1912

Kinetoscope #1
Immediately when you enter the next area, theres a bar named The Salty Oyster, but it is locked. If you have enough picks, get inside, deal with the opponents, and check the far right corner for the bathrooms.
Just next to them is the first BioShock Infinite Port Prosperity Kinetoscope.
Luteces Brother Arrives In Columbia!

Voxophone #2
Follow the waypoint to reach a large hall (it is marked Grand Central Depot). As you enter the hall, there are two offices on each side.
Theres a big fight in here, but when its over, check the one thats on the left side (right side if youre looking from the middle of the hall).
The office has a smaller room at the back, and inside that room is the second BioShock Infinite Port Prosperity Voxophone on top of some newspapers.
WHISPERS THROUGH THE WALL; Rosalind Lutece; October the 15th, 1893

Voxophone #3
Head upstairs, where the dead bodies are. As soon as you unlock the gate, enemy snipers attack you from the top of the archway/bridge. Get rid of them, but do not use the turnstiles. Instead, do as Elizabeth says and turn left at the archway to find a bookstore (Founders Books).
Ask her to pick the lock, and immediately turn right to see the third BioShock Infinite Port Prosperity Voxophone next to a big teddy bear.
A WINDOW; Rosalind Lutece; October the 15th, 1893

Voxophone #4
Inside the bookstore mentioned above, find the stairs that lead to the basement. The fourth BioShock Infinite Port Prosperity Voxophone should be in the middle of the room, on a table next to one of the couches.
If you collect this Voxophone you trigger an optional quest involving a hidden closet inside The Salty Oyster.
SALLY; Ronald Frank; July the 16th, 1912

Voxophone #5
Make your way back to The Salty Oyster bar. When you reach the bar, go around the counter and press the button under the register. The hidden room is now accessible, and you need to go inside and take a look to your left to see the fifth BioShock Infinite Port Prosperity Voxophone.
While inside, grab the Infusion bottle and dont forget about the Return to Sender Vigor.
ONE AND THE SAME; Rosalind Lutece; October the 15th, 1893
When youre done exploring you should return to the archway/bridge. Use the turnstile to reach an elevator. Find the combination for the elevator, and after the cutscene, use it to unlock the next chapter, Downtown Emporia.
