ZipLines!

 Camelback Mountain Adventures   Tannersville, PA   (30 minutes East on I80)

Blue Mountain  (30 minutes South on Turnpike 476)
Whitewater Challengers:   They also have zip-lining!  The zip-line course is at their headquarters, just 8 mi from the cabin, down Lehigh Gorge Dr.
Adventure Zipline at Whitewater Rafting Adventure  Rts 209 & 93 Nesquehoning, PA  (30 minutes from cabin) 

Along with Ziplines, they also have mountain biking, ropes courses and hiking