Caves are some of the most awe-inspiring natural wonders on the planet. Formed over thousands or even millions of years, they offer a glimpse into a hidden world that most of us never get to see.
From enormous caverns that stretch for miles underground to delicate formations that sparkle in the light, caves are a testament to the power and beauty of nature.
Discovered in 1991 but not explored fully until 2009, Son Doong Cave is the world's largest cave by volume.
Located in Kentucky, Mammoth Cave is the world's longest cave system, with over 400 miles of explored passages.
One of the most unique caves in the world, the Waitomo Glowworm Caves are home to thousands of tiny glowworms that create a breathtaking spectacle.
As the largest ice cave in the world, Eisriesenwelt is a truly unique and stunning natural wonder.
While technically not a cave, Cenote Angelita is an underwater sinkhole that is one of the most breathtaking natural wonders in the world.
Located in the Guangxi region of China, the Reed Flute Cave is a stunning underground world of colorful rock formations and ancient inscriptions.
Located in Carlsbad Caverns National Park in New Mexico, Lechuguilla Cave is one of the deepest and most complex caves in the world.
Also known as Voronya Cave, Krubera is the deepest known cave in the world, with explored depths reaching over 7,200 feet.
The Skocjan Caves are a UNESCO World Heritage Site located in southwestern Slovenia.