Otter Cliffs, Acadia National Park, Maine

Working for that cliffside view

Maine's Acadia National Park serves up spectacular views at most every turn. But the park's Otter Cliffs on Mount Desert Island offer the adventurous among us a chance to take in the picturesque Atlantic shoreline from the edge of a sheer granite wall. Rising some 60 feet above the crashing waves below, the cliffs are shown here at low tide—when the tide is up, that ledge at the bottom is completely submerged.

The spot's become one of New England's premier climbing destinations, with routes beloved by experts and beginners alike. Climbers begin by either rappelling down the cliff or being lowered from the top. The heart races at the bottom, as waves crash against the seawall right below the climber's shoes and ocean spray makes the first few hand- and footholds slippery. From there, the only way out is up, back to the top of this stunning crag and the cap to a thrilling ascent.