http://www.cnn.com/2006/TECH/05/11/grand.canyon.skywalk/index.html The outer edge would make a very safe base jumping launch point for the 3800 foot drop, for selected values of safe. Or for a verrrry long bungy jump. (Cliff actually too close for that over any distance). RM Ref: Philip Quirke -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist