There are several other buildings with trees inside, in Buenos Aires (Argentina), one of the tallest towers (the YPF tower, by architect César Pelli), has an Eu

There are several other buildings with trees inside, in Buenos Aires (Argentina), one of the tallest towers (the YPF tower, by architect César Pelli), has an Eucalyptus grove inside. http://www.flickr.com/photos/guido-martinez/4686769123/ http://www.flickr.com/photos/guido-martinez/4686769123/ http://www.skyscrapercity.com/showthread.php?t=342972&page=2 http://www.skyscrapercity.com/showthread.php?t=342972&pa... In Mexico City, you have "La Torre del Árbol" (Tree Tower), with a baobab tree that goes outside a window on the 9th floor, it has now grown up to the 13th floor http://www.judastechnologies.com/2009/10/30/la-historia-no-autorizada-de-la-torre-del-arbol/ http://www.judastechnologies.com/2009/10/30/la-historia-no-a... Edit: j1o1h1n mentioned the Capita Centre in Sydney, Australia: http://www.sydneyarchitecture.com/cbd/cbd4-008.htm http://www.sydneyarchitecture.com/cbd/cbd4-008.htm Le Corbusier built the Curutchet building in Buenos Aires, also with a tree in the middle: http://majocobe.blogspot.com/2009/01/casa-del-doctor-curutchet-imagen-de.html http://majocobe.blogspot.com/2009/01/casa-del-doctor-curutch... Edit: an amazing amount of examples from everywhere from Vancouver to Paris to New York to Chicago in the comments.