Imagine this: There's a cave in Mexico, the Cave of the Crystals, where you can find some of the largest natural crystals ever discovered. These massive selenite crystals are as big as tree trunks and can reach lengths of up to 39 feet! 🌟 Discovered accidentally by miners in 2000, the cave is like stepping into Superman's Fortress of Solitude. But here's the kicker: the temperature inside can soar to 136°F with 90-99% humidity – it's no walk in the park! 😅 If you plan to visit, be prepared to sweat like never before!