Remains of the wild cat occur in English caverns; while from those of Ireland (where the wild species has apparently been unknown during the historic period) have been obtained jaws and teeth which it has been suggested are referable to the Egyptian rather than to the European wild cat.
There are several interesting limestone caverns, and Sylvan Lake, in the high mountain district, is an important resort.
Fresh water, rising and falling with the tide, is found in certain large caverns in Lifu, and by sinking to the sea-level a supply may be obtained in any part of the island.
Thus the scenery of a limestone country depends on the solubility and permeability of the rocks, leading to the typical Karst-formations of caverns, swallowholes and underground stream courses, with the contingent phenomena of dry valleys and natural bridges.
In the neighbourhood are the cave of Drach, containing several underground lakes, and the caves of Arta, one of the largest and finest groups of stalactite caverns in western Europe.
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