Take a boat ride into the Blue Grotto sea cave and witness the waters glow a brilliant blue. Two holes in the cave cause the miraculous illumination, as red reflections are filtered when light passes through the water into the cavern. The entranceway is only large enough for a tiny rowboat to enter, but once you make your way inside you’ll be transported into a fantasy land filled with neon water. You can even dip your hand in the water and see it glow instantly. Located in Campania, Italy, this cave of wonder defies the odds by lighting up a place meant for darkness.
Tucked in the British overseas territory of Bermuda lies the grandiose Crystal Cave. Formed during the Ice Age, the cave is a spectacular sight to behold, as the cave walls are littered with stalactites and crystallized soda straws. Famous Author Mark Twainwas the first tourist to descend into the majestic cave, calling it “the most beautiful cave in the world.” Filled with azure blue water and decorated with unique chandelier clusters, walking through the cave feels like you’re walking into a fantastical amusement park built by nature.