Many good wishes from Ireland and Anam Cara at the Summer Solstice!
The Summer Solstice in the Northern Hemisphere is on June 20th at 23:09 UT/GMT this year. In Ancient Ireland, many of the Megalithic Monuments were aligned to the rising or setting sun on key solar points in the year. In the Boyne Valley, we have the famous Winter Solstice alignment at Newgrange. Townleyhall, a small passage tomb located just north of Newgrange, is aligned with the rising sun at the Summer Solstice http://www.knowth.com/townleyhall-summer-solstice.htm
At Carrowkeel in the west of Ireland, Cairn G is aligned with the setting sun at the Summer Solstice http://www.newgrange.com/carrowkeel-solstice-08.htm (from Michael Fox -- firstname.lastname@example.org)