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Set about 16,000 feet above sea level, Sol de Mañana is one of the most extreme geothermal zones on the planet. Rife with bubbling mudpots, steaming fumaroles, and sulfur-stained sediment—all fueled by volcanic heat just beneath the surface—this unique environment reminds us that Earth's molten interior is always looking for ways to sneak out. The streaks of orange, white, and rust-red seen in this aerial shot are the results of mineral deposits and microbes that thrive in these infernal conditions. Despite its remote location on the Altiplano of southwestern Bolivia, Sol de Mañana draws plenty of scientists and curious travelers seeking a glimpse into our planet's hidden inner workings.