Dothraki Grasslands

Slemish Mountain, the legendary first known Irish home of Saint Patrick, is located in Co. Antrim. The mountain rises about 1500 feet (437 metres) above the surrounding plain, and it is actually the central core of an extinct volcano.
According to legend, following his capture and being brought as a slave to Ireland, Patrick worked as a shepherd at Slemish Mountain for about six years, from ages 16 through 22, for a man named Milchu (or Miluic).