Windcatcher

Architectural element for creating a draft

A windcatcher, wind tower, or wind scoop (Persian: بادگیر, romanized: Badgir) is a traditional architectural element used to create cross ventilation and passive cooling in buildings. Windcatchers come in various designs, depending on whether local prevailing winds are unidirectional, bidirectional, or multidirectional, on how they change with altitude, on the daily temperature cycle, on humidity, and on how much dust needs to be removed. Despite the name, windcatchers can also function without wind.

From Wikipedia, under CC BY-SA. More on occurri.