Changi airport gets world's tallest 131-ft indoor waterfall. The airport is located in _________.

The world's tallest indoor waterfall, 131-foot-tall, opened for the general public at Singapore's Jewel Changi Airport. The waterfall is housed inside a dome-shaped complex which has gardens growing over four storeys, more than 280 retail and food outlets, a hotel and a movie theatre. The structure also has a botanical garden with 120 species of plants.