"Here at the deepest point of the caves, our tour comes to an end."
"Hidden in the nooks and crannies of the earth are the most beautiful cave systems you could imagine."
"Mammoth Cave National Park holds the record as being the place where you'll find the longest known continuous cave system in the entire world."
"Waitomo Glowworm Caves: home to a species of glowworm found nowhere else in the world, creating a magical illumination."
"Reed Flute Cave: named after the reeds that grow outside, adorned with over 70 ancient inscriptions."
"Carlsbad Caverns: featuring the largest known cave chamber in the U.S., the Big Room."
"Ice Reisenveld Ice Cave: the largest natural ice cave in the world, with stunning formations and an icy palace."
"Cave of Crystals: home to the largest naturally formed crystals, a glimpse into the subterranean world's wonders."
"Puerto Princesa Subterranean River: a navigable underground river in the Philippines, surrounded by majestic formations."
"Caves are pretty mysterious... it's not just an area or space under the surface of the Earth."
"Deep within the enchanting lamalunga caves of altamora Italy...an extraordinary skeleton covered in calcite."
"So many stories about children, so many of them going missing and turning up in caves wedged in between impossibly tight spaces."
"The whole cave system, so you can go explore."
"The finding of these caves offers a fascinating insight into the technology and traditions of Viking-era Icelanders."
"He lived in a series of caves along the trail that you can still explore to this day."
"This is one of the coolest cave adventures ever."
"Nora caught a cold and began to sneeze. Jack said they must move to the caves at once or they would all get cold, and if they were ill, what would happen? There was no doctor to make them well."
"This is going to be rather fun. We shall be cave people this winter."
"Mammoth Cave is the only national park in Kentucky and hosts the longest known cave system in the world."
"I ain't messing around with no caves man I don't trust those caves man."
"Brilliant! These caves are ridiculously exciting."
"To find one of these terrors you have to travel deep underground to the prehistoric caves."
"Caves are awesome, you know, they're beautiful, they're like nothing you know that we are accustomed to seeing."
"I don't only you know go and do work in caves because of this obvious interest in Maya uh prehistory but caves are awesome you know they're beautiful they're like nothing you know that we are accustomed to seeing."
"Caves are perceived as the womb of the Earth right and therefore associated with fertility."
"I love caves, something about a cave, oh this is so cool."
"Speleologists are the first to discover and explore the mysterious world of caves."
"We were lucky enough to be here early in the morning before the crowds and we got to explore the caves basically all to ourselves."
"We almost forgot to tell you that in addition to its beauty, this beach is also known for its caves."
"Janolan Caves is the most ancient open caves in the world with arguably the most beautiful limestone formations."
"The rugged and complex geology of the Grand Canyon offers a favorable environment for the formation of caves."
"Wow, Kent's Cavern was amazing, I'm blown away."
"Kentucky has the largest cave system in the world, with over 200 miles of caves."
"The world is full of incredible sunken caves and caverns to explore."
"This was an incredible cave system in South Africa where many anthropological discoveries have been made."
"There are rivers; they flow underground through vast cave systems."
"Caves are always a constant 54 degrees."
"Most people think free diving into caves is very dangerous, and they're right."
"What is the coolest thing you've seen on a cave that makes you marvel at the creation?"
"More than 500 caves have been discovered beneath these streets."
"Make sure you take care of our caves because they're pretty neat to explore."
"The key thing to remember about the caves in Florida is that most of them convey groundwater to springs."
"Underneath the Woodville karst plain has the most extensive system of underwater caves in the United States."
"There is still much to be explored inside the Tayos caves of Ecuador."
"The Quarry Hill Nature Center has a pond for kids, hiking trails for adventure lovers, and historical sandstone caves for curious travelers."
"Exploring caves, the theme is fantastic, very much Disney-esque."
"The cave temples of the Himalayas, mysterious caves carved on the side of a flat mountain face."
"These caves must have been the holiest of holy places during the peak of their use."
"These caves are home to astonishing discoveries, breathtaking treasure, and even some dark tales of mythical beasts and diseased humans locked away from the rest of society."
"These caves right here are extremely old and they are around 400 million years old."
"Caves are those natural underground spaces into which people can enter."
"Over time, the passage expands to become a cave or cave system."