Mark Twain once called Waimea Canyon the "Grand Canyon of the Pacific" and he was certainly right to do so. The area was built up by lava flows, but eons of erosion have carved a 10-mile-long, 1-mile-wide, and more than 3,600 foot deep gorge. We decided to hike the popular Canyon Trail to Waipo'o Falls. The hike was moderately strenuous and although we didn't make it to Waipo'o Falls (it started to rain and dusk was upon us), we were treated to amazing views, sounds of wild goats, and a beautiful (albeit smaller) waterfall.