Try going to Peach Springs and walking out over the Grand Canyon on their glass shelf.....
(http://www.thegreenhead.com/imgs/grand_canyon_skywalk-4.jpg)
(http://2.bp.blogspot.com/-H4Xj9Aa7s1s/UJpQoPgjlVI/AAAAAAAAB7k/QFbc5xlnvhE/s1600/The+Grand+Canyon+Skywalk.jpg)
(http://hawkpb.files.wordpress.com/2011/05/0_21_grand_canyon_skywalk_1.jpg)
(http://farm3.static.flickr.com/2301/1810272965_2345b51db0_o.jpg)
Try going to Peach Springs and walking out over the Grand Canyon on their glass shelf.....
(http://www.thegreenhead.com/imgs/grand_canyon_skywalk-4.jpg)
Nooooooooo!! And I've heard about some clear floor at the top of the Sears Tower in Chicago. NO WAY!