Taman Sari, also known as the Taman Sari Water Castle, is a site of a former royal garden of the Sultanate of Yogyakarta. Located in the city of Yogyakarta, Indonesia, it is a stunning complex that features bathing complexes, pools, and a series of underground waterways and rooms. Built in the mid-18th century during the reign of Sultan Hamengkubuwono I, the water castle is a fine example of Javanese architecture with a blend of Western influences. Taman Sari was originally designed for multiple purposes, such as a resting area, a workshop, a meditation area, a defense area, and a hiding place. Now, it is a popular tourist attraction, showcasing the rich cultural heritage of Yogyakarta. The complex embodies the opulence and ingenuity of the era with its intricate design and hidden passages. Visitors can explore the underground mosque, the sumptuous bathing pools used by the royal family, and the beautiful gardens. The remnants of this site demonstrate the sophistication of the water management and architectural techniques of the time.