(Waimea) Kauai, Hawaii
The Grand Canyon of the Pacific -- Waimea Canyon: This valley, known for its reddish lava beds, reminds everyone who sees it of Arizona's Grand Canyon. Kauai's version is bursting with ever-changing color, just like its namesake, but it's smaller -- only a mile wide, 3,567 feet deep, and 12 miles long. All this grandeur was caused by a massive earthquake that sent existing streams flowing into a single river, which then carved this picturesque canyon. You can stop by the road to view the canyon, hike down into it, or swoop through it by helicopter.