If there's a place that screams bragging rights, it's California's Death Valley. It got its name for a reason – humans are not meant to go here. Planet earth's hottest temperature was recorded in the desert in 1913, a staggering 56.7º C (134º F). It's so hot your shoes will melt on the asphalt. To survive, you need to constantly be taking on electrolyte fluids to replace essential minerals lost through sweat. Wearing sunscreen is probably a good idea too.