Orochimaru's Hideouts

Orochimaru has several secret hideouts located in several countries. These ranged from usually inconspicuous underground hideouts with holes for entrances to more grand ones hidden on an island. All these hideouts were outfitted with laboratories where he and later Kabuto Yakushi would carry out experiments.

Otogakure Hideout
Though possibly not a hideout, this building was built below a tree. It has two markings on it reminiscent of a snake and what appears to be a snake's skull on the top-most part. This is where Orochimaru returned to after Hiruzen Sarutobi had sealed his hands and he remained here while he experienced the adverse effects of his rotting hands. This is also where Orochimaru kept the hand with his Akatsuki ring which Itachi Uchiha had severed.

Kusagakure Hideout
This hideout is located somewhere in Kusagakure or there about. Another hideout built entirely underground with the entrance being at the foot of a rock formation. Within the hideout itself are numerous rooms and a statue of a gigantic snake coiled up with candles in its eyes. This is where Sai attempted to carry out his secret mission to kill Sasuke Uchiha. This is also where Sakura and Naruto reunited with Sasuke after two years. The confrontation culminated with a portion of the hideout being destroyed.

Laboratory
This laboratory is built into the side of a small island located in a large body of water. It is first seen when Orochimaru brings Kabuto to the building to explain the reason he was attacked by Nonō and how it was part of a plan engineered by Danzō. Orochimaru then explains to Kabuto that the building they are in is a medical laboratory created for him to use.

The lab is covered in medical equipment, ranging from scalpel to test-tubes. The lab's most unique feature however is the large blood extracting machine in the center of the room. One of the room's massive walls is covered in ceiling length shelves stacked full of jared animals, books, scrolls, crates, and tools. Kabuto later comes here to transfuse blood of Orochimaru's true form into himself. In the background, several tanks contain large snake-like entities. One of them had an upper body that looked human. Several years later, the same tanks are noticeably empty.