The Indonesian Miniature Project, as it was initially called, broke ground through the Harapan Kita Foundation in 1972. The concept drew from Indonesia's staggering diversity: more than 17,000 islands, hundreds of ethnic groups, six officially recognized religions. Tien Suharto's foundation managed the park until her husband's fall from power in 1998, and Suharto's descendants continued running it until 2021, when the state-owned tourism company InJourney took over operations. The park opened on April 20, 1975, with pavilions representing each of the country's then-26 provinces, arranged around a central lake whose shape mirrors the Indonesian archipelago. The project cost approximately US$26 million -- a figure that provoked controversy in a country where rural poverty remained widespread. But the park endured, outlasting both the regime that built it and the criticisms that accompanied its construction.

Each provincial pavilion is built in the vernacular architectural style of its region, and the result is an open-air textbook of Indonesian building traditions. The West Sumatra pavilion features a Minangkabau Rumah Gadang, with its dramatic horn-shaped roof peaks. The South Sulawesi pavilion holds both a Torajan tongkonan and a Bugis stilt house. Central Java's joglo, with its layered pyramidal roof, stands alongside the ornately carved Kudus house. Bali's compound arrives complete with a candi bentar split gate and kori agung entrance. Each pavilion houses collections of traditional clothing, wedding costumes, dance costumes, and ethnographic artifacts. On Sundays, small stages and amphitheaters come alive with regional dance and music performances. Cafeterias serve local cuisine, so visitors can eat West Sumatran rendang in one pavilion and Javanese gudeg in the next. The park has grown with the nation: when Indonesia expanded from 27 to 33 provinces in the 2000s, new pavilions were added. After the recognition of Chinese Indonesian culture as integral to the national identity in 2000, a Chinese Indonesian pavilion and Confucian temple were built.

At the heart of the park lies the archipelago lake, a body of water whose outline replicates Indonesia's island chain. Miniature islands within it are edged with multicolor LED lighting that glows after sunset. Every evening, the Tirta Cerita -- "water of stories" in Sanskrit-derived Indonesian -- transforms the lake with dancing fountains and a water screen projecting nine Indonesian folk tales. On weekends, 300 drones join the display, forming shapes including a garuda and the park's own landmark: the Keong Emas theater. This golden-snail-shaped building was Indonesia's only IMAX cinema for decades. Surrounding the lake, the park holds 15 museums covering subjects from stamps to oil and gas, from Asmat carving to military history. The Purna Bhakti Pertiwi Museum, built in the tumpeng rice-mountain style, once displayed Suharto's personal collection of gifts and artworks -- an artifact of the New Order era that built this place.

By the 2010s, TMII had grown cluttered. A waterpark, roller rink, and 4D theater had crept in, diluting the cultural mission. In 2022, the park closed for a sweeping revitalization that cost 1.7 trillion rupiah, with an additional 200 billion from InJourney. The overhaul was radical. The waterpark was demolished and replaced with Gajah Mada Plaza. The ratio of green space to buildings was restored to the original 1972 master plan: 70 percent open ground, 30 percent structures. Private cars and motorcycles were banned entirely. Visitors now explore by electric microbus, cable car, bicycle, or electric scooter -- making TMII a designated low-emission zone in a city notorious for its traffic. President Joko Widodo inaugurated the revitalized park on September 1, 2023. A new observation tower, the Saudjana, offers 360-degree views over the archipelago lake. The Cultural Stage replaced the demolished Garuda Theatre, which had last served as the kabaddi venue for the 2018 Asian Games.

TMII exists at an interesting intersection of nation-building and theme park, political project and genuine cultural preservation. Religious buildings representing Islam, Catholicism, Protestantism, Hinduism, Buddhism, and Confucianism stand within walking distance of one another -- not because their congregations happen to be neighbors, but because the park was designed to model the interfaith tolerance Indonesia aspires to. The Dunia Air Tawar aquarium holds over 6,000 animals from 126 species, including what may be a specimen of the extinct Chitala lopis featherback fish. The Indonesia Science Center, operated by the national research agency BRIN, has drawn 341,000 visitors yearly with 300 interactive exhibits. Even the park's food tells a national story: the Pasar Nusantara food court, opened in April 2025, offers dishes from across the entire archipelago under one roof. For a country of 275 million people spread across three time zones, the idea of seeing all of Indonesia in a single day remains as seductive now as it was when a first lady sketched it on the back of an ambition in 1970.