Deep cave exploration is a fascinating field of caving (cave science) and geology. There are many deep and unique caves in the world. Here are some examples: 1. **Krasnogorskaya cave (Krasnogorsk region, Russia):** This cave is located in the Baikal region and is one of the deepest caves in the world. The depth is more than 2.2 km. 2. **Raven Cave (Georgia):** Located in Abkhazia, it has a depth of more than 2 km. Researchers have discovered unique underground formations such as gypsum crystals. 3. **Red Cavern Canyon (USA):** This cave in Kentucky is one of the deepest in the world and includes many branches and passages. Its depth is more than 1.5 km. 4. **Kruber-Voronya Cave (Georgia):** This is one of the deepest caves on the planet. The depth of this cave exceeds 2.2 km. 5. **Sarma (Mexico):** This cave is located in the Sierra de El Abra region of Mexico and has a depth of more than 1.5 km. Studies of deep caves can provide important data on geological processes
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