Though commercial airline developers have toiled to provide such luxuries as hot towels and tiny blankets, consumers long for the simple excitement of wind in their hair. Today's Groupon invigorates inner Icaruses: for $85, you get one spot on a biplane flight or glider ride over Acadia National Park for two people from Acadia Air Tours in Trenton, Maine (up to a $219 value). Groupon buyers can also receive half off a future whale-watching tour at the park.

Acadia Air Tours gives gravity-obeying groundhuggers the chance to soar on historic biplanes and gliders that offer gorgeous, panoramic views of Acadia National Park and Bar Harbor. During a 20- to 25-minute biplane flight ($155) or a 15- to 20-minute glider ride ($219), eye spheres can soak up expansive vistas of the nature-ridden scenery and majestic lighthouses as the craft's sturdy wings show off their altitudinal aptitude. Each stratosphere-encroaching journey is conducted a half-mile outside of Acadia National Park's boundaries and at least 2,000 feet above the ground to preserve the area's serene soundscape and to prevent run-ins with low-flying ostriches.