Jewel Changi Airport in Singapore is home to the Rain Vortex, the world's tallest indoor waterfall, which falls from the ceiling of a toroid or donut-shaped dome that consists of a complex steel framework with glass panels.

The water cascades 40m to the ground, where it disappears into a sloped oculus in the floor at up to 37,850 liters per minute. Spanning five stories and occupying some 22,000mē, surrounding the vortex is the Shiseido Forest Valley, which is fashioned as a tropical indoor garden.

The Changi Airport (fig.) skytrain runs straight through the dome, over a bridge near the vortex, whilst at the topmost level is Canopy Park, a large recreation and leisure zone, with a Canopy Bridge that has a section of its floor with glass panels.