Most caves are in limestone or dolomite rocks. Some (e.g. Carlsbad Caverns) are in gypsum rocks. But caves can also exist in lava deposits (e.g. lava tube caves), marble rocks (i.e. metamorphosed limestone), and many other types of rocks at lower rates, depending on various variables.
Caves usually and mostly forms in sedimentary rocks. Example, Limestone.
The majority of aves are made up of limestone Stalagmite rocks
Land caves can be found all around the world, with significant locations including the United States, Mexico, Australia, China, France, and Spain. They are typically formed in areas with limestone, volcanic rock, or gypsum deposits that have been eroded by natural processes like water, wind, and tectonic activity.
In areas of past or present explosive felsic volcanism
Everywhere water is frequenly in contact with rocks. Like seashores, rivers, underground caves etc...
Ocean caves are formed from most commonly formed by calcium and magnesium, usually sedimentary rocks. They can also be made of granite.
you can find it in the desert or caves like ferey path
rocks, caves, mud
In rocks or in underground caves
trees, on rocks, caves
All different kinds, usually quartz.
Caves are natural occurrence in nature. No one "built" it.