Off the beaten path you can do cage diving with crocodiles...Australia is a prime location for this along with South Africa. Coming face to face with the jaws of these terrifying and immensely powerful prehistoric creatures is certain to give you the heebie-jebbies...10 Unusual Ideas to Add to your Bucket List
Daikon-jima bridge, Matsue, Japan
Not sure I'd have the nerve to go through with it, but would love to try...
http://www.greeneratravel.com/ Green Era Travel - Cambodia Tour Operator Kintai bridge, Iwakuni, Japan
Giethoorn is a village in the Dutch province of Overijssel. It's known as "Venice of the North" or "Venice of the Netherlands". There are absolutely no roads and all transport is conducted by water over one of the many canals.
Naruto bridge and whirling current, Japan
The 'Thank God Ledge' Yosemite National Park, California