1. The store is purposefully designed without signs to force people to wander through all the aisles and find things to buy.
2. You can cancel your membership and get a 100% refund at any time.
3. Costco employees are paid handsomely.
4. You can return almost anything.
5. The people behind the sample tables don't actually work for Costco — they're contractors hired by Costco.
6. The cult favorite chicken bake is so delicious because it's made with pizza dough (in addition to chicken strips, mozzarella, bacon, and Caesar dressing.)
7. Anyone — even non-members — can buy booze from Costco*.
8. The name of the store's private label brand — Kirkland Signature — comes from Kirkland, Washington, the location of Costco's corporate headquarters at the time of the brand's naming.
9. Costco was started by a former Price Club employee.
10. As of 2015, Costco alone sold more stuff every year than Amazon.
11. Costco has locations all around the world, including in Japan, Australia, France, and South Korea.
12. It's technically one of America's biggest pizza chains.
13. And this is how their pizzas are made.
14. Options for any item are limited to reduce labor costs.
15. Employees get a free executive membership.
16. Costco doesn't offer bags, because they look too "retail."
17. The hot dog and soda combo has been sold for $1.50 since the deal was introduced in the mid-1980s.
18. As of 2015, a third of Costco's US business comes from locations in California.
19. Sunday is their busiest day.
