At Roland Garros airport on Réunion island, the ceiling design funnels a light tropical breeze into the terminal

At the arrivals terminal at Roland Garros airport on Réunion island, visitors are greeted by floor-to-ceiling windows framing the lush green mountains of the French Indian Ocean territory.

What they may have also expected was the icy chill of air conditioning; this island just off Madagascar sits in the tropical zone to the south of the equator. But instead, the terminal is cooled by a light tropical breeze, the result of natural ventilation built into its unique design.