Yamcha's hideout (ヤムチャの隠れ家) was the home of Yamcha and Puar, located in Diablo Desert. The two lived there back in their days as bandits, but they moved to West City after they prevented Emperor Pilaf from taking over the world, and later returned. The address of the hideout is NB: 8250012B.
The hideout is in a craggy mountain with a hollow interior and the Chinese idiom "千錘百煉" (roughly translates to "tempered a hundred times by a thousand hammers") written on the front side. Since it is in a region thick with rocks, it blends into the scenery and is hard to pick out. Due to this, it became the perfect hideout for the bandit Yamcha. A large hole opens up in the top, and the outside can be surveyed from there. The appearance of the hideout changes a bit in the movie Dragon Ball: Curse of the Blood Rubies.
It is revealed in Dragon Ball: Origins that Yamcha returns to his hideout after the 21st World Martial Arts Tournament to get some of his belongings before going training under Master Roshi. According to Dragon Ball Z: Attack of the Saiyans, Yamcha and Puar move back to the hideout after King Piccolo's defeat. In this video game, Monster Carrot takes over Yamcha's hideout while he was training out. After Yamcha defeats him, he forces Monster Carrot to do chores like cleaning the hideout. Yamcha then left again when he learned that he would receive training from Kami (in the anime he receives the news when in a baseball riot) and does not move back until sometime after Goku defeats Kid Buu (as revealed in Dragon Ball GT).