Hike to the Everest Base Camp. Although the trek sees throngs of hikers you cant help but be wowed at some of the highest mountains on the planet. Drop dead gorgeous mountain scenery and the sherpa culture conspire to make this a winning two week trek.
Trinity College Library (the 'Long Room'), Dublin. There has been a library at the College ever since it was founded (in but the Long Room was not begun until Completed in it is the largest library in Ireland, containing books.