From USA Weekend magazine:
Now you can get a bird's-eye view of the rich bio-diversity of the forest's top layer. Tree canopy walkways (suspended bridges and platforms used by scientists to study nature) are a new spin on eco-tourism. Debuting this fall: Oxbow Meadows Canopy Trail, in a regenerating forest in Columbus, GA.
http://www.egret.us/ox/index.htm
In Whitefish, Montana, a 750-foot-long walkway and two seven-story platforms are suspended between firs and cedars.
http://www.dailyinterlake.com/NewsEngine/S...ta=44-815030-29
In Worcester, Mass., EcoTarium science museum's Creature of the Night trek takes you nearly 40 feet above oaks and hickories.
http://www.ecotarium.org/tour/outdoors/canopy/index.html
In Sarasota, FL, Myakka Canopy Walkway is a three-story-high, 85 foot long bridge through a subtropical forest; a 74 foot tower overlooks the anitics of herons, eagles and ospreys.
http://www.abrock.com/FloridaParks/Myakka/canopy.html