The source provides an extensive overview of La Isla de las Muñecas (The Island of the Dolls), a chilling tourist attraction located within the Xochimilco canals near Mexico City. This infamous acre of land is covered with thousands of mutilated, decaying dolls placed there by a recluse named Don Julián Santana Barrera. The episode explains that Julián began collecting and hanging the dolls—often seen as vessels for spirits or talismans—to appease the spirit of a young girl who tragically drowned near his isolated chinampa in the mid-1950s. The episode details Julián’s lonely existence, the psychological decline that led to his decades-long obsession, and his mysterious death in 2001, which occurred near the girl's original drowning spot. Finally, the episode explores the island's modern legacy as a site of dark tourism, amplified by paranormal investigators, pop culture references, and persistent legends of supernatural activity.