Until March 2004, the site was a riding academy and café owned by a local family. The facility is in the town of Antivilai, in the forest 20 kilometers northeast of the city center of Vilnius, near an exclusive suburb where many government officials live…

According to sources that saw the facility, the riding academy originally consisted of an indoor riding area with a red metallic roof, a stable and a cafe. The CIA built a thick concrete wall inside the riding area. Behind the wall, it built what one Lithuanian source called a “building within a building.”

On a series of thick concrete pads, it installed what a source called “prefabricated pods” to house prisoners, each separated from the other by five or six feet. Each pod included a shower, a bed and a toilet. Separate cells were constructed for interrogations. The CIA converted much of the rest of the building into garage space.