Ziplines originally were invented for just two functions: sneaking hamburgers over the Berlin Wall and zazzing up presidential entrances to State of the Union addresses. Show up in style with this Groupon: for $35, you get a five zipline explorer canopy tour (a $75 value) from eXplore Brown County at Valley Branch Retreat in Nashville.

Featured on WTHR Channel 13, the aerial aficionados at eXplore Brown County at Valley Branch Retreat teach visitors the course's high-speed ropes before sending them careening above 500 acres of pristine hardwood forest. Zipline cables create an adrenaline-pumping web at heights of up to 70 feet where budding Tarzans can practice their best flying-squirrel impressions on ziplines 4–8. A harness double-clipped to a steel cable keeps guests safe as they leap to and from both elevated tree towers and grounded take-off platforms. Zipliners glide through a canopy of coniferous trees and take wing over a lake on runs that stretch up to 560 feet like an over-achieving yardstick. Indiana's tree-covered countryside reveals itself from below as adventurers cross along two cloud-touching suspension bridges and test Newton's theories during a tower rappel. Explore the FAQ page for more information on canopy tours.