72 Hour Urban Action is a competitive architectural festival that generates interventions in public space within an extreme deadline, a tight budget, and limited space. 120 international participants working in 10 teams have 3 days and nights to design and build their projects in the public realm. The teams design, build, work, sleep and party on site, enriching the city with a multi-cultural and multi-disciplinary experience. The first 72 Hour Urban Action took place in September 2010 as part of the Bat-Yam Biennale of Landscape Urbanism in Israel.