Arlong Park was built on the coastline, near the ocean, where the pool on the outside was linked to the outer seas, for Mohmoo to go in and out of, with a pair of steel gates that kept it closed. The building itself was modeled after the main building in Sabaody Park and contained two notable rooms. The first was the weapon room, on the first floor, where Zoro'sWado Ichimonji was kept when he was captured, until it was returned to him by Nami; it is also where the Kiribachi, along with several katana, were kept. The second was the map room, on the top fifth floor, where Nami was forced to make maps for the pirates, and Arlong intended to keep Nami in the room for the rest of her life. Luffy could sense the sadness Nami suffered in the room, and that the pen she used was bloodied.