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Go Ape:

Zip wire heaven...
The first Scottish course and what an impact it's made. Stunning scenery of the surrounding Queen Elizabeth Forest Park gives the course a jaw-dropping backdrop.
Oh, and let's not forget, arguably, the course's main attraction - Britain’s two longest zip wires, each stretching over 400m long, flying customers 150 feet above ground over a 90 foot waterfall.
http://www.goape.co.uk/days-out-in/stirlingshire/aberfoyle/the-course