1.
Newgrange County Meath, built about 3300 BC, more than 500 years before the great pyramid at giza and 1000 years before Stonehenge. At dawn on December 21st every year the sun shines through the opening to light the inside of the passageway, it only happens once every year
http://upload.wikimedia.org/wikipedi...-Newgrange.JPG
2.
Custom House Dublin, designed by James Gandon and finished in 1791, it was nearly totally destroyed by fire during the Irish civil war of the early 1920s, it was retored to its former glories in the 1980s
http://upload.wikimedia.org/wikipedi...at_night_2.jpg
3.
Four Courts Dublin, another Gandon masterpiece which was completed in 1802, it too was very badly damaged in the Irish civil war but by 1932 the building was operational again
http://irelandposters.com/dublin_cit...land_photo.jpg
4.
Trinity College Dublin, opened in 1592 the college's alumni include Samuel Beckett, Bram Stoker, Jonathan Swift and Oscar Wilde
http://www.paddi.net/images/tcdaerial.jpg
5.
Ha'penny Bridge Dublin, built in 1816, the bridge is so called due to a half penny toll that was required in order to cross, the toll was dropped in 1919
http://upload.wikimedia.org/wikipedi...Liffeyeast.jpg
6.
Bunratty Castle, County Clare, the current struture was finished in 1425 but there has been a castle on the site since 970 AD, predecessors were razed to the ground by various groups, today it is one of the few fully working castles left in ireland
http://www.netdata-systems.co.uk/Web...s/Bunratty.jpg
7.
Sean's Bar, Athlone, the oldest pub/bar in Europe dating back to 900 AD, and is listed by Guinness World Records as so. During renovations in 1970, the walls of the bar were found to be made of wattle and wicker, dating back to the ninth century. Guinness are currently investigating whether Sean's is the oldest bar in the world.
http://www.karott.com/gallery/pictur...2/DSC01151.jpg
8.
Blarney Castle County Cork the castle dates from around 1200 AD and is famous worldwide for the Blarney Stone
http://www.guide-to-castles-of-europ...es/Blarney.jpg