The country’s most famous university is also one of the most stunning areas, equipped with outstanding buildings and landscapes that date back to the 18th century. Be sure to take a peek at Book of Kells, one of the world’s most famous manuscripts, which is housed in The Old Library.
Definitely take some time to walk around the mall. It's quite large, but I'd recommend heading over in the direction of the capitol, or going over to the Lincoln Memorial and Vietnam Memorial area.