Saint Patrick's Cathedral, A magnificent cathedral that houses Jonathan Swift's remains (he wrote Gulliver's Travels). It is the only remaining cathedral in Ireland with a daily sung services. A small entrance fee is charged for tourists and all money raised goes back to paying for the upkeep of the building.
The British Museum is considered one of the world’s greatest museums of human history and culture. Its permanent collection consists of eight million works, coming from all continents. It illustrates and documents the story of human culture from its beginnings to the present. Also, the place is absolutely humongous!