From the top of Mauna Kea Hawaii (13,800ft) looking out toward the sunset Maui peeks through the sea of clouds below us. One of the many space observatories shines in the sun, getting ready to open up as the horizon goes dark.
When the sun sets up here you can literally feel the temperature drop upwards of ten degrees (F) instantly. The view is worth it though.
Japan has an observatory up here that contains what is believed to be the most perfect piece of glass in the world. It is a concave mirror eight inches thick. They say that if you were to enlarge the mirror to the same size as the Pacific ocean, the largest imperfection would only be three feet high!
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