|show cave||Show caves are caves with comfortable paths, light (normally electric light), and guided tours.
They are open to the public, but normally the visit costs a fee.|
The symbol we used, is the Greek letter Omega, which is often used as a symbol for cave on maps, mainly because it looks like the portal of a cave. The red colour means show cave.
|Other cave||Caves are natural voids undergroud, large enough to be visited by humans.
But on showcaves.com only two special sorts of caves are included:
|(Karst-) spring||Springs are very often related to caves and sometimes to mines.
Underground voids are always a place where ground water is collected.
The biggest springs on earth are always karst springs, waterfilled caves reaching the surface.
So it is rather logical to add some famous springs to showcaves.com.
The symbol we used, is a blue dot, which is often used as a symbol for springs on maps.
|Karst feature||Karst is a geological phenomenon which is responsible for most caves of the world.
Beneath the caves there are other interesting geological structures, like sinkholes and loosing streams.
The symbol we used, is a circle with centric lines, which is often used as a symbol for small depressions, often sinkholes, on maps.
|Show mine||Show mines are former mines with comfortable paths, light (normally electric light), and guided tours.
They are open to the public, but normally the visit costs a fee.
The symbol we used, two crossed hammer-like tools. This tools were the typical tools of miners in the middle ages, one used as a hammer, the other as a chisel, to break the rocks. It is often used as a symbol for mining and especially for mines on maps.
|Subterranea||Subterranea means anything, that does not fit in one of the above classes.
This means, in fact, any sort of artificial cavities or exibitions about caves.
So the most common objects in this category are speleologic museums, medieval cellars and tunnels.|
The symbol is the entrance of a tunnel, an artificial cavity, often used on maps.
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