What book did you see the design in? Indianapolis Zoo is a fantastic zoo to see young elephants as there have been a number of youngsters born there in the past decade. Also, this photo only shows a small section of the 2+ acre exhibit.
Zoo Design: The Reality of wild Illusions Kenneth J. Polakowski, The University of Michigan school of Natural resouirces ISBN 0-944150-00-4 Page 61 I enclose a poor scan of the original idea. it may well just be that an idea.
Does anybody know what happens with the Indianapolis Zoo's tropical megafauna exhibits (elephants, rhinos, giraffes, antelope, cheetahs, lions, etc.) during the winter?
Do they have houses with indoor viewing for some or all of these species, or are these species just not on exhibit during times when they can't be outside due to weather?