Precious Medals

Precious Medals is a quest in the Fallout 4 add-on Nuka-World.

Detailed walkthrough
Precious Medals is a simple collection quest that can be completed as a side activity during The Grand Tour since all the required locations are visited during the latter quest. Every location where a Park Medallion needs to be picked up has a Park Medallion dispenser close by. These waist-high gadgets are fairly inconspicuous and can easily be mistaken for Nuka-World's trash bins at a glance, so a bit of searching my be required to find some of them.

Ferris Wheel
 * Located in the Kiddie Kingdom
 * The dispenser can be found near the queue barriers

Mad Mulligan's Minecart Coaster
 * Located in Dry Rock Gulch
 * The dispenser can be found by the counter in the gift shop inside Mad Mulligan's Mine

Nuka-Galaxy
 * Located in the Galactic Zone
 * The dispenser can be found at the exit ramp

Cappy's Treehouse
 * Located in the center of the Safari Adventure zone
 * The dispenser can be found straight ahead after arriving at the tree house via elevator

Nuka Racers
 * Located in the Kiddie Kingdom
 * The dispenser can be found at the entry point to the car track near the queue barriers

Vault-Tec: Among the Stars
 * Located in the Galactic Zone
 * The dispenser can be found at the end of the Vault-Tec Exhibit, to the players right upon exiting the fake Vault Door.

World of Refreshment
 * Located at the Nuka-Cola Bottling Plant
 * The dispenser can be found by the queue barriers at the entrance to the plant on the south side of the building

Once all medallions have been acquired, return to NIRA for the reward consisting of one bottle of Nuka-Cola Dark, Nuka-Cola Grape and Nuka-Cola Quantum each, as well as a minor amount of XP.