It's not easy to find to the average guest who merely glances, but if you look at Tatooine Traders, the gift shop at the end of the Star Tours attraction, from the outside, you'll notice a desert theme to the exterior that is meant to remind guests of the planet that Anakin and Luke Sywalker came from that was featured in the films. As your eyes move to the left of the building, you'll notice a rather large gray siding that is between Tatooine Traders and the Star Tours building. This seemingly unimportant facade actually is a relic of what used to be at the Star Tours attraction.
The gray facade is leftover from the first store that was at the end of Star Tours before Tattooine Traders, called Endor Vendors. The building was themed after the bunker on the moon of Endor from Return of the Jedi and fit right in with the Endor theme and was open when Star Tours first opened in the Studios. Endor Vendors closed in 1999 to be replaced by Tatooine Traders.
In an interesting bit of history repeating itself, the Jedi Training Academy attraction, which is on the opposite end of the Star Tours area from where Endor Vendors used to be, has the exact same theme that Endor Vendors once had. For whatever reason, the siding of the old Endor Vendors remains today and can still be seen through the Endor Forest area.