Best known for her crazy installations involving mattresses, Argentinian Conceptual artist Marta Minujin has created a seven-story high Tower of Babel at Plaza San Martin in Buenos Aires using 30,000 books donated by readers, libraries, and more than 50 embassies around the world; the structure celebrates the fact that the city was recently named the World Book Capital 2011. The tower is open for visitors to scale until the 28th of this month, at which point it will be dismantled, and the books, given away to the public. [Teaching Literacy via The Book Bench]