"In contrast to the human-scale of the prototype, the Clock in the mountain will be monumental, almost architectural in scale. It will be roughly 200 feet tall. Located under a remote limestone mountain in the Sierra Diablo Mountain range in Texas, it will require a day’s hike to reach its interior gears. Just reaching the entrance tunnel situated 1500 feet above the high scrub desert will leave some visitors out of breath, nicked by thorns, and wondering what they got themselves into." Beautiful; not only that they're building it, but that pilgrimage is practically built into the design. "You wind the clock by walking", as it were.