And if you're a caving enthusiast, don't hesitate to contact the mountain guides who organise cave expeditions for an incredible experience.
The 7 Most Impressive Caves on Earth
1. Voronya Cave. This appears to be the deepest cave on the planet. Located in Georgia, various expeditions over the years estimate it may reach 2,700 metres deep. No team of experts has ever reached the absolute bottom, with the lowest achieved depth being 2,197 metres by Ukrainian explorer Gennadiy Samokhin.
2. Hölloch Cave. Located in Switzerland, this is Europe's second longest cave at 197 metres long. With a depth of nearly 940 metres, it was discovered accidentally by a farmer who found an entrance in Muotatal. Some sections maintain a constant 6°C temperature, and there's even an area amidst pristine jungle in the Bödmeren forest.
3. Lechuguilla Cave. Located in New Mexico, this cave contains stunning gypsum and sulphur formations creating impressive yellow colour blends. Ranking as the world's fifth longest cave system, it extends nearly 500 metres deep and 200 metres long.
4. Lamprechtsofen. With its nearly unpronounceable name, this Austrian cave plunges 1,632 metres deep. Surrounded by local legends, it was actually walled up in 1701 to deter treasure hunters (skeletons were discovered here in the early 20th century).
5. Gouffre Mirolda. This French cave in the Haut-Giffre massif reaches 1,733 metres deep. Long believed to be the world's deepest, it lost the top spot to Voronya Cave after a 2006 expedition.
6. Torca del Cerro del Cuevón. As Spain's deepest cave and the world's fourth deepest, this 1,589-metre system in Asturias' Picos de Europa was discovered in 1998. The challenging descent requires... a full 3 days to complete!
7. Huautla Cave System. Mexico contains one of the world's deepest cave networks. With over 1,475 metres depth and multiple entrances across 72km, this system features countless underground watercourses, pools and internal waterfalls.
Which one do you find most spectacular?
