Here's the Celsius Special at Curry Village.

"And, if the weather gets cold enough, guests stay free! For example, if the previous night's low temperature is 32°F (0°C) or lower, guests will enjoy a complimentary stay in an unheated tent cabin surrounded by the world-famous scenery of Yosemite National Park."
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Verum audaces non gerunt indusia alba. - Ipsi dixit MCMLXXII