Monroe said this was evident when she visited two Costco stores in California.
"[The stores are] literally across the freeway from one another and they sell different stuff," Monroe said. "And there's things you can get at one that you can't buy at the other."
When it comes to international Costco stores, there are certain specialties that each store offers that are unique to the warehouse or region.
For Monroe, finding these unique items is part of the fun.
"Sometimes there are things that literally are only available at one Costco location and it's kind of cool to find them," she said.
In addition to item assortment, Monroe quickly realized that different elements that were present in some stores were not in others.
"There's some warehouses that have some unique attributes to them that stand out from other warehouses," Monroe said."So it's fun to go to those."
For example, the Costco in Pentagon City in Arlington, Virginia, has a chocolate shop in its bakery section.
Monroe said the chocolate shop in the Pentagon City Costco makes the Virginia warehouse store one of the more special Costcos she has visited.
People can pick up Easter bunnies, nutcrackers, Santas, and champagne bottles — all made out of chocolate, Monroe said.
The chocolate shop also produces molds of the Capitol and the Pentagon.
"It's really fun to find unique things like that," said Monroe.
The Costco Business Center in Orlando has a "Costco Market" where you can buy cheap items individually — not in bulk.
Ramsey said that this Costco Market, located in a Costco Business Center in Orlando, Florida, is a must-visit every time she is traveling nearby.
She described the Costco Market as a "Costco convenience store" where customers can pick up individually packaged items.
"I love it because you get the Costco things that you enjoy, you get this amazing price, but you dont necessarily have to walk away with a case of everything," she said. "You can get a variety."
Monroe said a Costco warehouse in Queens, New York, is located inside an old foundry for metal casting.
"It has a super unique kind of quirky layout," Ramsey said of the warehouse.
Though there are a lot of differences among Costco stores, Monroe said that there are certain constants she can always rely on, like the Kirkland Signature brand and the general layout of each store.
Costco's in-house Kirkland Signature brand is one of the defining characteristics of the warehouse store. Costco lovers constantly praise the brand for its low prices and high quality.
Monroe says she can always depend on a Costco warehouse carrying the Kirkland brand, which gives her a sense of familiarity and comfort when she's traveling abroad. She also said that the general layout of each warehouse follows a similar pattern.
"If I ever feel homesick, I can just go to Costco," Monroe said, later adding, "I just feel at home at Costco so no matter where I am in the world, it's just comforting."