Topic summary
Sídhe

Extracted from the Wikipedia article Aos Sí.
The sídhe
A sídh (anglicised "shee") is a mound or tumulus associated with the aos sí. In modern Irish, the word is sí (plural síthe); in Scottish Gaelic it is sìth (plural sìthean); in Old Irish it is síd (plural síde). These sídhe are referred to in English as "fairy mounds", "elf mounds" or "hollow hills".