The Indoor Stadium, left, a detail of the exterior cladding, right.
The roof of the indoor stadium is a true feat of Engineering. It is built from four giant reinforced concrete umbrellas, each structurally independent, each spanning nearly 90 feet. In the view above you see one of the four pillars supporting the deeply coffered concrete ceiling, and the daylight in the space between the umbrellas. Vann Molyvann uses a number of different techniques to block direct sunlight from entering the space. The bleachers are open to the outside, and light filters in from the evenly spaced openings between them. The exterior cladding is made up of extruded aluminum v-sections that interlock to reflect the light to the interior. The effect during the day of these softly glowing verticals and the points of light at the seating is really pretty spectacular. The coffers provide a nice home for bats, too, which made sitting at the top level of the bleachers a bit uncomfortable, for me at least.